The life process by which organisms respond to changes in the environment is called adaptation.

Here's why:

* Adaptation refers to the process where organisms evolve traits that help them survive and reproduce in their specific environment. These changes can be physical, behavioral, or physiological.

* Responding to changes is a key part of adaptation. When the environment shifts, organisms that can adjust their behavior, physiology, or physical characteristics have a better chance of survival and passing on their genes.

Examples of Adaptation:

* Camouflage: A chameleon changing color to blend into its surroundings is a behavioral adaptation.

* Hibernation: A bear entering a dormant state during winter is a physiological adaptation.

* Thick fur: A polar bear having thick fur to survive cold temperatures is a physical adaptation.

Let me know if you'd like more details about any of these concepts!