Question

the northern red - legged frog, or rana aurora, is found along the western coast from british columbia to northern california. their typical breeding season lasts from january to march. the foothill yellow - legged frog, or rana boylii, is found along the western coast from northern oregon to central california. their typical breeding season lasts from april to july. what mechanism might keep rana aurora and rana boylii from mating?
geographic isolation
anatomical isolation
temporal isolation
behavioral isolation

Explanation:

Temporal isolation occurs when species breed at different times (seasons, times of day, etc.). Rana aurora breeds January - March, Rana boylii breeds April - July. Their breeding seasons don’t overlap, so temporal isolation is the mechanism here. Geographic isolation would be different locations (but their ranges overlap in parts), anatomical is about physical structures, behavioral about mating behaviors (not indicated here).

Answer:

temporal isolation