Question

Many species of mites, such as this one, live on the outer surface of human skin. They obtain their food by eating dead skin cells and neither harm nor benefit humans. This type of relationship is called:

Answer 1

This type of relationship is called commensalism. In commensalism, one species benefits from the interaction while the other is neither helped nor harmed. In this case, the mites benefit by feeding on dead skin cells, while humans are not negatively affected by their presence.