It is much easier for a small animal to run uphill than for a large animal, because:

Options

A. smaller animals have a higher metabolic rate
B. small animals have a lower `O_(2)` requirement the efficiency of muscles in large animals is less than in the small animals
C. it is easier to carry a small body weight
D. it is easier to carry a heavy body weight

Answer

A

Explanation

Basal metabolic rate is inversely proportional to body size. So, smaller animals have a higher metabolic rate, thus have quick and more energy required to go up the hills.