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| Interaction Type | Sign | Description |
|---|---|---|
| $(a)$ Parasitism | $(i) -, 0$ | $(A)$ Both get benefitted |
| $(b)$ Amensalism | $(ii) -, -$ | $(B)$ One gets harmed,other has no effect |
| $(c)$ Competition | $(iii) +, -$ | $(C)$ Both get harmed |
| $(d)$ Mutualism | $(iv) +, +$ | $(D)$ One is harmed and second is benefited |
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