Together with the gorilla, the chimpanzee is our closest cousin in the animal world. Most people feel an immediate kinship with this great ape, with its large range of facial gestures, body postures, and expressive sounds. The chimp has a skill once attributed only to humans but now known to occur in various animal groups --- the use of simple tools. The chimp even makes its own tools for specific purposes. It will take a leafy twig and strip the leaves to make a long, thin stick for use as a termite catcher. The chimp pokes it through a narrow entrance into a termite nest, then it extracts the stick and licks off the juicy termites.
Chimps also crush leaves in their palms for use as sponges. They hold the leaves in water that they cannot reach with their mouths, such as that in a hollow log. Then they extract the leafy sponge and suck the moisture from it.
Like the young gorillas and humans, baby chimps have a long childhood, up to ten years in some cases. During this time, they find out how to feed and groom themselves, avoid danger, and communicate with other members of their group. Their behavior is partly instinctive. They also learn by observing other members of the group, and through trial and error.
【題組】Paragraphs 2 and 3 emphasize the function of chimps' _______.
(A) feet
(B) hands
(C) mouths
(D) tails
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