| Effects on Organism $1$ | Effects on Organism $2$ (Benefit,Harm,No Effect) |
| Benefit | Mutualism,Predation,$B$ |
| Harm | $A$,Competition,Amensalism |
| No Effect | Commensalism,$C$,$-$ |
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| $(I)$ Interaction | $(II)$ Effect |
|---|---|
| $(a) (+, -)$ | $(P)$ Amensalism |
| $(b) (-, -)$ | $(Q)$ Commensalism |
| $(c) (-, 0)$ | $(R)$ Predation |
| $(d) (+, 0)$ | $(S)$ Competition |
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