Question

a student has written a paper about a deer population that was separated when a canyon developed between members of the groups. in her paper, she showed that the two groups adapted differently and can no longer interbreed. what would be the best title for her paper?
speciation by geographic isolation
speciation by reproductive isolation
how natural selection creates species
how adaptation creates species

Explanation:

Geographic isolation occurs when a physical barrier (like the canyon in this case) separates a population. Over time, the separated groups adapt differently. Reproductive isolation (when groups can't interbreed) is a result here, but the initial cause is geographic isolation. Natural selection and adaptation are part of the process but the key point is the separation by the canyon (geographic isolation).

Answer:

A. Speciation by Geographic Isolation