What is a possible explanation for what darwin observed?

( A

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Explanation:

A possible explanation for what darwin observed was the birds had beaks that were adapted for feeding differently. Why he was studying the birds beaks that have been adapted for different food was because he noticed that there were birds that may have came from the same ancestor but they all had different characteristics and he soon realized it was becasue they all were adapted for each island the bird was at.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.