I believe that the answer is B.
It is the ratio of a line segment cut into two pieces of different lengths such that the ratio of the whole segment to that of the longer segment is equal to the ratio of the longer segment to the shorter segment.
<span>D.
It allows hummingbirds to access certain nutrients more efficiently than other species.
The long and thin beak allows the hummingbird to collect nectar from thin flowers.</span>
The answer for this question would be choice D) An erosional surface representing a gap of time in the geological record or the fourth option.
