Two species of similar-looking insects have the same coloration, although one is poisonous and the other is not. this is likely an example of
a. an analogous structure
b. a homologous structure
c. camouflage
d. mimicry

The correct answer is option d, that is, mimicry.

Explanation:

Mimicry in evolutionary biology refers to an evolved similarity between the organism and another organism of other species. The phenomenon may take place between the individuals of a similar species or between the individuals of distinct species. The main objective of mimicry is to safeguard the species from predators, resulting in an antipredator adaptation.  

The evolution of mimicry takes place when the predator witnesses a similarity between the model and the mimic and as a consequence modifies its behavior in a manner, which offers a selective benefit to the mimic.  

i think the miocene epoch spans the time from 23 million to 12 million years ago.

yes? sounds right, but you didn’t ask a question.