Biological activity refers to the various processes and interactions that occur within living organisms. This includes functions such as metabolism, growth, reproduction, and response to environmental stimuli. These activities are essential for maintaining life and are driven by complex biochemical reactions. In ecosystems, biological activity also encompasses interactions between different organisms, such as predation, competition, and symbiosis. These interactions help regulate populations and contribute to the overall health and stability of the environment. Understanding biological activity is crucial for fields like ecology and medicine, as it informs how organisms function and interact with one another.