Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.
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Question: Paragraph- Sent 1: Earths magnetic field helps protect Earth and its organisms.
Sent 2: It protects us from harmful particles given off by the sun.
Sent 3: Most of the particles are attracted to the north and south magnetic poles.
Sent 4: This is where Earths magnetic field is strongest.
Sent 5: This is also where relatively few organisms live.
Sent 6: Another benefit of Earths magnetic field is its use for navigation.
Sent 7: People use compasses to detect Earths magnetic north pole.
Sent 8: Knowing this helps them tell direction.
Sent 9: Many animals have natural 'compasses' that work just as well.
Sent 10: Birds like the garden warbler in Figure 1.36 use Earths magnetic field.
Sent 11: They use it to guide their annual migrations.
Sent 12: Recent research suggests that warblers and other migrating birds have structures in their eyes.
Sent 13: These structures let them see Earths magnetic field as a visual pattern. 
Question: What do the structures in a bird's eye allow them to do?.

Answer: The structures in their eyes let them see Earths magnetic field as a visual pattern.


Question: Paragraph- Sent 1: Fossils may form in other ways.
Sent 2: Fossils can be preserved almost completely.
Sent 3: In this process, the organism doesnt change much.
Sent 4: As seen below, tree sap may cover an organism.
Sent 5: With time, the sap hardens.
Sent 6: It turns to into amber.
Sent 7: The original organism is preserved.
Sent 8: This is very exciting for scientists.
Sent 9: They are able to study the DNA of the organism that no longer lives on Earth.
Sent 10: Some animals have been found frozen in ice.
Sent 11: Others have been found in tar pits after falling in.
Sent 12: Molds and casts are another way organisms can be fossilized.
Sent 13: Have you ever walked in soft mud and left footprints?
Sent 14: Once in a while, these traces of organisms can be preserved.
Sent 15: In this case, nothing is left of the organism.
Sent 16: A mold is an imprint of an organism that is preserved in rock.
Sent 17: The organisms remains break down completely.
Sent 18: There is nothing left of the original plant and animal. 
Question: What are other ways organisms can be preserved?.

Answer: They can be fossilized in tar pits or frozen in ice. Molds and casts in mud can also preserve organisms.


Question: Paragraph- Sent 1: Hurlburt Field, Florida (CNN) -- An Air Force CV-22 Osprey crashed Wednesday during a routine training mission north of Navarre, Florida, injuring five crew members aboard, a military official said.
Sent 2: The crash occurred about 6:45 p.m.
Sent 3: at Hurlburt Field's Eglin Range, said Amy Nicholson, chief of public affairs at the airfield.
Sent 4: The five injured crew members were taken to an area hospital, Nicholson said.
Sent 5: The extent of their injuries was not immediately known.
Sent 6: The cause of the accident is under investigation, she said.
Sent 7: The Osprey was assigned to the 1st Special Operations Wing, the Air Force said.
Sent 8: The tilt-rotor aircraft can fly like an airplane and land like a helicopter.
Sent 9: The Army began developing the Osprey in 1982, though the program was nearly scrapped in 1989 when then-Secretary of Defense Dick Cheney sought to cancel it because of ballooning costs.
Sent 10: Questions were raised about the safety of the Osprey after two crashes, including one in 1992 at a Marine Corps air base in Virginia that killed the crew.
Sent 11: In late 2000, the Marine Corps grounded the Osprey fleet after two crashes -- one in Arizona that killed four crew members and 15 passengers, and another in North Carolina that killed the crew.
Sent 12: A redesign was ordered on the Osprey, and it resumed flights in 2002.
Sent 13: The Air Force began using Ospreys in 2008 after testing the aircraft in 2006.
Sent 14: They were first deployed by the Marines in Iraq in 2007 after 18 years and $20 billion in development. 
Question: In how many states have Osprey crashes resulted in deaths according to the article?.

Answer:
3.


