Ahawk building its nest on an arm of a saguaro cactus is an example of
a. commensalism.
b. mutualism.
c. parasitism.
d. predation.

A hawk building its nest on an arm of a saguaro cactus is an example of commensalism. The correct option among all the options given in the question is option "a". Commensalism is actually an ecological procedure in which an organism benefits from the other organism without effecting it in any way.

A hawk building its nest on an arm of a saguaro cactus is an example of commensalism.Commensalism is a type of interaction between the organisms in which one of the organisms derives benefits while the other organism is neither benefitted nor harmed.In the relation between hawk and saguaro cactus, the hawk is the one which derives benefit as it builds its nest on the saguaro cactus, thus the cactus provides habitat to the hawk. However, saguaro cactus is not affected in any way from this hawk.Therefore, the relation between them is an example of commensalism.

More; less is the correct answer

Life, yes life it self madden