To solve this problem, we need to match the interactions in List I with their corresponding effects on the organisms in List II. Let's analyze each interaction:$\newline \bullet$A. Mutualism:$\newline$ - In mutualism, both organisms involved benefit from the interaction.$\newline$ - This matches with IV. +(A), +(B).$\newline \bullet$B. Commensalism:$\newline$ - In commensalism, one organism benefits while the other is neither helped nor harmed.$\newline$ - This matches with I. +(A), O(B).$\newline \bullet$C. Amensalism:$\newline$ - In amensalism, one organism is harmed while the other is unaffected.$\newline$ - This matches with II. –(A), O(B).$\newline \bullet$D. Parasitism:$\newline$ - In parasitism, one organism benefits at the expense of the other.$\newline$ - This matches with III. +(A), –(B).$\newline$Now, let's match the items from List I with List II:$\newline A \rightarrow IV, B \rightarrow I, C \rightarrow II, D \rightarrow III \newline$This corresponds to Option 2, which is the correct option.