The correct option is A A woodpecker and a wren
Ecologically, competition refers to the interaction between the organisms or species wherein the fitness of one lowers the presence of others. There are many reasons for competition and limited resources are one of the factors. Competition further classified on the basis of mechanism, and species. Based on mechanism competition can be interference,- where the organisms fight for scarce resources, exploitative- where the organisms interact indirectly by consuming scarce resources or apparent- which occurs indirectly between two species as these are preyed upon by the same predator. woodpecker and wren is an example of exploitative competition.