Final answer:
Habitat isolation is a prezygotic barrier that prevents interbreeding between populations that are separated into different environments, leading to species divergence.
Step-by-step explanation:
Habitat isolation is a type of prezygotic barrier that occurs when populations of the same species move or are moved to new habitats where they no longer overlap with other populations, leading to reproductive isolation. An example of this could be a cricket population divided by a flood, which ultimately results in the divergence of the two groups due to different environmental pressures and natural selection. This form of isolation ensures that reproduction ceases before the formation of a zygote, hence being categorized as prezygotic.