Question

a relationship between two species where one benefits while the other is harmed. commensalism naturalism parasitism mutualism

Explanation:

• Commensalism: One species benefits, the other is neither helped nor harmed.
• Naturalism: A philosophical approach, not a biological relationship type.
• Parasitism: One species benefits (parasite), the other is harmed (host).
• Mutualism: Both species benefit from the relationship.

Answer:

Parasitism