What type of ecological interaction exists between the whale and the barnacles?

• A. Competition
• B. Parasitism
• C. Commensalism
• D. Mutualism

Answer: (C)

Verified step by step guidance

1. Begin by understanding the concept of ecological interactions. These are relationships between organisms in an ecosystem, which can be beneficial, harmful, or neutral to one or both parties involved.
2. Identify the types of ecological interactions mentioned: Competition, Parasitism, Commensalism, and Mutualism. Each has distinct characteristics: Competition involves organisms vying for the same resources; Parasitism involves one organism benefiting at the expense of another; Commensalism involves one organism benefiting while the other is neither helped nor harmed; Mutualism involves both organisms benefiting.
3. Consider the relationship between whales and barnacles. Barnacles attach themselves to the skin of whales, gaining a place to live and access to food particles in the water as the whale moves. The whale is not significantly harmed or helped by the presence of barnacles.
4. Evaluate the interaction based on the definitions: Since barnacles benefit by gaining a habitat and food access without affecting the whale, this interaction fits the definition of Commensalism.
5. Conclude that the ecological interaction between the whale and barnacles is Commensalism, as the barnacles benefit from the relationship while the whale remains unaffected.