Answer:
food sources
Explanation:
Because food sources varied from island to island, the finches with the best beak size and shape for the available food survived and reproduced better that those with beaks less suited to that particular island. Over time, the finches evolved into separate species.
Well fishermen like to catch fish so upwelling off the coast of Peru provides lots of fish
We need the multiple choices for this question.
I'm not quite sure what you mean by which sphere, but I found that the most abundant gas on earth is nitrogen at 78%. Hope this helps