when a snake grows, it be comes long and thick. Due to this, its skin stretches. Since it slithers on the ground, the skin gets rough and damaged. To keep it shiny, clean and of the right size for the baby, the snake shed its skin regularly. This process is called moulting. A new skin grows in place of the one that shed.
Monkey and apes are considered to be the most intelligent mammals. The chimpanzee's intelligence is believed to be very similar to man. They use tools more than any other animal, for example, the use stones to crack nuts. They also use leaves as sponges for soaking up water to drink. Chimpanzee's also communicate with hand gestures and facial expressions.
Source: https://www.youtube.com/watch?v=sqv6pmLBp7U
