Hummingbirds can hover because
A)they have large breast muscles that enable their wings to generate lift in the upstroke and downstroke.
B)they burn only sugar and not fat.
C)their wings beat rapidly,often higher than 30 beats/sec.
D)A and C

Question

Quizplus · Accepted Answer

Hummingbirds are able to hover due to the combination of their large breast muscles and their ability to beat their wings rapidly at a rate of over 30 beats per second. This allows them to generate lift in both the upstroke and downstroke of their wings, which is necessary for sustained hovering. Additionally, hummingbirds burn only sugar, which provides them with the high energy levels needed to maintain their rapid wing beats and hovering behavior. Therefore, the correct answer is D, as choices A and C are both necessary factors for the hummingbird's ability to hover.

Hummingbirds Can Hover Because