An animal is a creature. They generally feed on organic matter, things that can be felt, moved, moved autonomously or moved. Including people.

According to fossil research, the earliest animals on earth originated from the ocean. After a long geological period, early marine animals gradually evolved into various branches, enriching the early life forms of the earth. Prehistoric animals appeared in their respective activities before human beings appeared. Later, they became extinct in the ever-changing living environment. However, the animals on the earth are still evolving and multiplying from low to high and from simple to complex, with today's diversity.