Final answer:
Tortoises on different islands developed different neck lengths based on the vegetation available for eating.
Step-by-step explanation:
An example of how organisms developed traits over time because of differences in their environments is seen in tortoises on islands with different vegetation.
On islands with plants near the ground, tortoises that ate these plants developed short necks in order to reach their food. On islands with tall shrubs, tortoises that ate the leaves from these shrubs developed longer necks to be able to stretch and eat the food.
Learn more about Organism traits in different environments