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| $(I)$ Interaction | $(II)$ Effect |
|---|---|
| $(a) (+, -)$ | $(P)$ Amensalism |
| $(b) (-, -)$ | $(Q)$ Commensalism |
| $(c) (-, 0)$ | $(R)$ Predation |
| $(d) (+, 0)$ | $(S)$ Competition |
| Column-$I$ | Column-$II$ |
| $P. +,+$ | $I. \text{Mutualism}$ |
| $Q. -,-$ | $II. \text{Parasitism}$ |
| $R. -,0$ | $III. \text{Competition}$ |
| $S. +,0$ | $IV. \text{Amensalism}$ |
| $T. +,-$ | $V. \text{Commensalism}$ |
| $VI. \text{Predation}$ |
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