Which perspective would state that people and their personalities are formed through the way in which they interact with and react to their social world?

Interactionist perspective

Explanation:

Interactionist perspective is a theoretical perspective that observes social interactions like cooperation or conflicts. The way people shape the society and how the society shapes people as well is shown through this perspective

Social interaction is majorly a one-on-one process involving both human and animal interactions, birthing actions and reactions. The interaction includes both verbal and non-verbal language, aimed at achieving communication.

Interactionist perspective targets how people see themselves in a social context.