Question

which event would most likely cause geographic isolation?
○ a large tree falling
○ volcanic eruption
○ widening of a lake
○ a forest fire

Explanation:

Geographic isolation occurs when a physical barrier separates a population. A volcanic eruption can create large - scale and long - lasting physical barriers (such as new land formations, ash fields that are difficult to cross, etc.). A large tree falling is a small - scale and relatively easily bypassed event. The widening of a lake may not always create an insurmountable barrier (depending on the species, some can swim or find other ways around). A forest fire is a temporary event and does not create a long - term physical barrier like a volcanic eruption.

Answer:

volcanic eruption