Who observes and records that how people and other animals relate to one another and to the environment?

Psychologists study mental processes and human behavior by observing, interpreting, and recording how people and other animals relate to one another and the environment.

Explanation:

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During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.