Answer: Behavioural ecology.
Step-by-step explanation:
Behavioural ecology is the study of how individuals behaves and interacts with each other within a particular society or community coupled with their evolutionary trend, this study looks into how a given population cooperates and competes with each other and how it affects evolutionary fitness in species. The study of behavioural ecology helps one to understand biological adaptation, how and where organism gets their food and how they escape from their preys, how they cope with unfavourable conditions, reasons why they migrate, etc.