Step 1: Understanding the Question:
This question deals with biological interactions between species, denoted by $(+, -, 0)$ signs representing benefit, harm, or neutrality.
Step 2: Detailed Explanation:
• Amensalism is an interaction where one species is harmed or negatively affected (-), while the other species remains neutral or unaffected (0).
• In agroforestry, this might occur if a tree produces allelochemicals that inhibit a crop's growth, but the crop has no significant effect on the tree's health.
• Mutualism (A): Both benefit (+,+).
- Competition (B): Both are affected negatively (-,-).
- Commensalism (C): One benefits, one is neutral (+,0).
Step 3: Final Answer:
Interaction is amensalistic if One component is affected and negligible effect on the other one.