There are four different species of Kangaroo- the red Kangaroo, the eastern grey Kangaroo, the western grey Kangaroo, and the antelope Kangaroo. They are the only large animals that use hopping as their primary method of locomotion. Their large tails provide balance as they hop around quickly on two legs or walk around slowly on all four legs.

Kangaroos can jump very high, sometimes three times their own height and they can also swim. On land, they move their hind legs together, however, in water, they kick each leg independently to swim. They eat grass, leaves, herbs, and roots. They need little water to enable them to go far distances. Kangaroos are social animals that stay in groups of at least three or four individuals. Some groups can have up to one hundred Kangaroos, most of which are active at night.

They usually have one young annually. Females have a bag in which babies live and drink milk for eight months. Kangaroos usually live about six years in the forest.

Kangaroo are social animals because they __________

A. are active mostly at night
B. are always in clusters  
C. can swim
D. can travel far
E. give brith to young ones yearly

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Correct Answer: B