Why are animals the closest relatives of man?

The biological address of a person, that is, his systematic position in the natural world:
– animal kingdom
– subkingdom multicellular
– type chordate
– class mammals
– a detachment of primates
– family of narrow-nosed monkeys
– genus man
– a kind of a reasonable person.
The class of mammals is otherwise called beasts. A person has in common with them: a 4-chambered heart, warm-bloodedness, hair, skin glands, 7 cervical vertebrae, an auricle, and, most importantly, intrauterine development and feeding of young with milk.