Talk about the origin and development of human beings, in which aspects have gradually changed.

In the course of the origin and development of human beings, the body shape, the use of tools and whether to wear clothes have gradually changed. 1. Walking from semi-upright to upright.

2. From not knowing how to use tools to using natural tools, to manufacturing and using simple tools, to manufacturing and using all kinds of complex modern tools including computers.

3. From being naked to knowing how to keep out the cold and hide your shame.

There are two reasons:

First, the change of environment has led to the change of lifestyle. A large number of forests have disappeared, forcing some apes to live in the fields and giving up arboreal life.

Second, in the process of fighting against nature, due to labor, the morphological structure and physiological function of oneself have gradually changed. ．