I'm white and I swim in the sea. The cold snow and ice are just right for me. Who amI? A polar bear!
Polar bears are the biggest meat-eaters on land. A polar bear can weigh as much as seven men. A polar bear's body is built for the Arctic (北极). These bears have thick fat that keeps body heat in. A polar bear's paws(爪) do many things. They can dig holes where the baby polar bears stay safe and warm in the snow. Also, they can break ice to find food and pull food out of the water.
A polar bear eats other animals. Seals(海豹) are its favorite food. The bear waits and waits because seals will come up for air at holes in the ice. Finally, when a seal appears,the polar bear catches it at once. Polar bears have good noses. They can smell a seal 20miles away! They have good hearing and eyesight, too. These are useful when they are looking for dinner.
The ice melts(融化) in spring and summer. Polar bears will move from the ice to land when the sea ice is mostly gone. But there is not much food for polar bears on land. The ice is melting earlier each year and it is forming later, too. Our earth is getting warmer and there is less sea ice now. This is dangerous for polar bears. The bears are hungry and they need the ice to find food.
①dig holes ②keep its body warm
③break ice to find food ④pull food out of the water