The mutualism example which is apt for desert biome is c<u>hipmunk and oak trees</u>.
<h2>Explanation:</h2>
The mutualism refers to the ecological interaction in which the species involved get benefited either ways. This ecological interaction is mostly found in most of the ecological community. This interaction is of two types which includes cooperation (working together) and symbiosis (parasitic, mutualistic, commensal or symbiotic).
The other options given does not come under mutualism. Though the desert coyote comes in desert biome it is not a correct answer because desert coyote does not eat fruit.