Final answer:
Competition between microscopic organisms on our bodies is good for us because it fosters a balanced ecosystem, helps prevent the overgrowth of harmful pathogens, and stimulates our immune system.
Step-by-step explanation:
Competition between the various microscopic organisms that live on us is beneficial for our health in several ways. Firstly, it fosters a balanced ecosystem on our skin and within our bodies, which helps maintain overall health and functionality. Secondly, this competition helps prevent the overgrowth of harmful pathogens, protecting us from infections and diseases. Lastly, it stimulates our immune system, aiding in its development and strength.