Question

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

• A. the efficiency of muscles in large animals is less than in small animals
• B. it is easier to carry small body weight
• C. smaller animals have a higher metabolic rate
• D. small animals have a lower $O_2$ requirement.

Answer 1

The correct option is C smaller animals have a higher metabolic rate

Metabolic rate is directly proportional to the size of an animal. Larger the animal, lower is the metabolic rate.

Small animals can run uphill than a large animal because of their fast metabolic rate.

So, the correct option is 'smaller animals have a higher metabolic rate'