The term for the synchronous movement of members within a group is cohesion. In biological contexts, cohesion can refer to the tendency for organisms, particularly social species, to move in unison, enhancing group survival and efficiency. This phenomenon is observed in various species, including schools of fish and flocks of birds, which rely on coordinated movement to evade predators and improve foraging success. Studying cohesion helps scientists understand social dynamics and behaviors in animal populations.