What term describes the ability of an organism to sense changes within its body?

The ability of an organism to sense changes within its body is referred to as responsiveness. This term encompasses how organisms detect internal stimuli, such as fluctuations in temperature, hunger levels, or the need for oxygen, and respond appropriately to maintain optimal functioning. Responsiveness encompasses a range of reactions, from simple reflexes to complex behavioral changes, and is crucial for survival as it allows an organism to adapt to changing conditions.

Homeostasis, while related, refers specifically to the overall process by which an organism maintains a stable internal environment despite external changes. It involves various physiological mechanisms and responses that work together to achieve equilibrium. Metabolism relates to the chemical processes that occur within a living organism to maintain life, including energy production and nutrient processing. Growth refers to an increase in size or mass of the organism through cellular reproduction and other mechanisms. Each of these terms has its unique focus, but responsiveness specifically emphasizes the organism's ability to sense and react to internal changes.