In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

[EX Q]: When land is cleared, habitats are lost. It may be cleared for agriculture. It may also be used for building new homes or businesses. Within the past 100 years, the amount of land used for agriculture has almost doubled. Land used for grazing cattle has more than doubled. Many wetlands have also been lost to agriculture. The U.S. has lost almost all the natural tall-grass prairies. Thee areas of tall thick grass have virtually disappeared. These areas of land had thick fertile soil. Their grasses had very deep root systems. These deep and thick roots reduced the amount of soil erosion. They also were home to many plants and animals. Prairies were wonderful places. They were home to colorful flowers, prairie dogs, and herds of bison. <sep>How can habitats be lost?<sep>killed by invasive tall grass
[EX A]: No

[EX Q]: A flood occurs when a river overflows its banks. This might happen because of heavy rains. Floodplains In very flat regions, flood water may spread out on the surface of the land. It then slows down and drops its sediment. If a river floods often, a floodplain develops. A floodplain is an area where a thick layer of rich soil is left behind as the floodwater recedes. Thats why floodplains are usually good places for growing plants. They are very flat areas and they have very rich soils. The Nile River valley is a great example of a floodplain. Each year, the Nile River rises over its banks. This floodwater carries a lot of sediment. This sediment has been eroded off areas of land from upstream. This sediment is dropped as the water slows down after spreading across the land. What is left behind is a very rich soil. Thats why crops can be raised in the middle of a sandy desert. Natural Levees A flooding river often forms natural levees along its banks. A levee is a raised strip of sediments deposited close to the waters edge. <sep>What may cause a river to flood and overflow its banks?<sep>Upstream erosion
[EX A]: No

[EX Q]: Pester came running into the room. He came to a fast stop when he saw the dog. He'd seen a dog before, every cat has, and he used to live with a black dog named Henry, but he'd never seen a brown one before. It seemed strange to him, but not as strange as it was to see Linda the brown chicken in the living room last spring. That still confused him. He thought he liked this dog, not because of the color, but because it was small. And it was so hairy. It was a like a mop that could run around. He jumped on his favorite chair and looked down as Maggie ran under it. She was kind of cute for a dog, Pester thought to himself. He layed down on the chair and pawed at her as she ran in a circle under it. He tapped her ears as she went by, and waved his tail like a flag trying to get her attention. After a little more of this, Pester curled up in a ball on the chair and took a nap. <sep>Why did Pester think of a mop when he saw the dog?<sep>It was so hairy
[EX A]:
Yes

