The biological term for a trait that increases an organism's chance of survival is called an adaptive trait. Adaptive traits enhance an organism's fitness, allowing it to thrive in its environment through better foraging, reproduction, or evasion of predators. Examples include physical adaptations such as camouflage in prey species or behavioral adaptations like migration patterns in birds. These traits evolve over time through the process of natural selection, where organisms with advantageous traits are more likely to survive and reproduce, perpetuating those traits within the population.