Answer:
Chimpanzees are the animals which are the closes to humans. Infact, the genome of chimpanzee is 98.6% similar to the genome of humans. Humans are thought to have evolved from chimpanzees.
Chimpanzees walk on all fours and have longer arms than legs. They are called “knuckle walkers” because they use their knuckles for support. Like humans, chimps have opposable thumbs and opposable big toes which allow them to grip things with their feet. This feature of chimpanzees for using knuckles for support makes them unique.
Chimpanzees are the only kind of animals which have the capability to groom each other which makes them unique.
