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.
Of all the big cats, the tiger is the largest â and the closest to extinction. As recently as 100 years ago, there were as many as 100,000 wild tigers living in Asia. Today, about 3,200 remain in the wild.The State of the Tiger. The tiger is one of the most iconic animals on earth, but the largest of the big cats is on the brink of extinction.s recently as 100 years ago, there were as many as 100,000 wild tigers living in Asia. Today, about 3,200 remain in the wild. The State of the Tiger. The tiger is one of the most iconic animals on earth, but the largest of the big cats is on the brink of extinction.