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256 Arrow-Puffin-4_Semester-1 ScienceLet%u2019s Revise Conceptual UnderstandingA. Choose the right answer.1. Elephants are . a. herbivores b. carnivores c. omnivores2. An animal that sucks the blood from the hosts is a. leeches b. hookworms c. round worms3. An example of a scavenger is . a. snake b. vulture c. tiger4. Dolphins swim with the help of . a. gills b. fins c. flippers5. The camel is best suited to live in a . a. sea b. desert c. hilly areaB. Fill in the blanks.1. The environment in which an animal lives is called its .2. Summer sleep by animals is called .3. Animals that live on land are called animals.4. Animals that depend on other animals for food are called .5. Winter sleep by animals is called .C. Give reasons for the following.1. Seals have a thick layer of fat under the skin. 2. A camel has long, thick eyelashes. 3. A polar bear sleeps during the winter months.