Answer:
Darwin referred to as the Father of Evolution proposed his famous theory of Natural Selection in which it mentions about the concept of Survival of fittest. He clearly explained that those who are better suited to the environment can produce offsprings and can continue their species .Thus although the tortoises of nearby islands appeared slightly different but they rather belonged to same species as they diverged only in accordance with the suitability of their environment.Those who were accustomed to eating plants remain confined near the grounds with shorter necks and rounded shells . Others adapted differently according to their needs
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