Which life process involves the response to stimuli?

Sensitivity is the life process that involves the response to stimuli. It refers to an organism's ability to detect changes in the environment and react accordingly. This can include responses to light, sound, temperature, or other stimuli which are critical for survival.

For example, plants exhibit sensitivity by growing towards light (a phenomenon known as phototropism), while animals might flee from predators or seek food based on various environmental cues. This responsiveness allows organisms to adapt to their surroundings, find resources, and enhance their chances of survival.

Movement, respiration, and growth are also vital life processes, but they do not primarily focus on the response to environmental stimuli. Movement involves changing position or location, respiration is related to the biochemical process of energy production, and growth pertains to the increase in size or number of cells. While these processes may involve some level of responsiveness, they do not encompass the broader concept of sensitivity as defined in biology.