Every fall, clusters of hundreds of danaus plexippus, or monarch butterflies, migrate into mexico. the traveling group of d. plexippus is one example of a(n) a. species b. ecosystem c. community d. biome

Species.

Explanation:

A species can be defined as the largest group of organism that consists of  two individuals of the opposite sex or the breeding types can produce an offspring which is able to reproduce by the process of sexual reproduction.

Ever year the cluster of hundreds of Danaus plexippus moves to another place in search of favorable conditions.

These organism are known as species and they migrate from one place to another for sometime and then they will return back and they will repeat this activity every year.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.