A) ++
B) +-0
C) --
D) +-
Correct Answer: D
Solution :
Predation and parasitism are of negative interactions i.e., (+ -) where members of one population may eat members of the other population, Protocooperation and mutualism are positive interactions i.e., (+ +) where two living organisms of different species are mutually benefitted.You need to login to perform this action.
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