D repeated rising and lowering the water table
The differences between environmental science and ecology is:
environmental science is the study of how the environment interacts and operates while ecology is the study of the ecosystem, which is the relationship between the environment and living organism.
So the difference is that environmental science doesn't really emphasise relationship like ecology does.
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B.) the available food on the islands
Since these different beaks were adaptions part of their evolution to be able to be more fit to survive with the food available on the island
