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 are predators and do not genreally have predators praying on them (other than humans). When a tiger feels threatened and needs to defend itself, it will bare its teeth, â¦ stick its claws out, and flatten its ears while growling and snarling and flicking its tail back and forth, all as warnings to back off. tiger's body is built for capturing and killing large prey through stealth and sudden attack. (2)   2. Powerful limbs and a flexible backbone enable tigers to quickly chase and catch prey over short distances. Tigers can cover up to 10 m (33 ft.) in a single leap.