Final answer:
Responsiveness is the ability of an organism to adjust to changes in its environment, essential for survival and reproduction, often regulated by feedback mechanisms.
Step-by-step explanation:
When an organism responds to changes in its immediate environment, it is a property called responsiveness. This ability allows an organism to adjust to both internal and external environmental changes. For instance, when faced with elevated body temperatures, humans respond by sweating and dilating blood vessels to cool down.
External stimuli can also trigger responses, such as moving toward food and water sources or away from perceived dangers. This reaction is essential for survival, as organisms must be able to sense and react to changes in their environments to stay healthy and reproduce.
Feedback mechanisms are often employed by organisms to maintain their internal environments and respond to external changes effectively.