This causes pieces of the continental crust to crack and pull apart. Some slabs of the crust sink, causing a rift zone. If the lithosphere continues to spread, a narrow sea can form. Continued spreading produces an ocean basin and ridge system.
Confidence votes 3. a tiger is a mammal because they give milk to their young and produce milk. They breath the air form of oxygen and produce milk. They fulfil the criterion that need to be fulfilled by a mammal. Thse being that they are warm blooded, animals that give birth to live young and sucle them.
Tigers have a better memory than any other animals including humans. They have a hundred times better memory than dogs and dozens of times better memory than primates. Tigers can run at a speed of approximately 60km/h for short distances. Tigers are conscious about the rights of females and kids. That is why when several tigers assemble around a kill, they wait for the females and kids to eat first. Whereas, it is just the opposite in the case of lions. A majestic creation of nature, Indiaâs national animal the tiger, was brought to the verge of extinction due to the illegal human interference on their habitat.