<h2>Answer</h2><h2>A. helical</h2><h2>
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Explanation:</h2>
D. the number of mates on the island
their appearance changes cause different birds breeding together can make an impact of how the bird looks
It is a mode of natural selection where an extreme phenotype is favored by the other phenotypes causing the allele frequency to shift over time in the direction of that phenotype
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<u>6</u><u>2</u><u>.</u><u> </u><u>B</u><u>.</u><u> </u><u>2</u><u> </u><u>AND</u><u> </u><u>4</u></h2>
<u>HOP</u><u>E</u><u> IT</u><u> </u><u>HELPS</u><u> </u><u>YOU</u>
The answer is energy i am pretty sure
