Plants and animals are comprised mainly of
a.
protein
b.
carbohydrates
c.
water
d.
muscle

The answer is C. Most of an animal or plant cell is water, and as such most of plants and animals is water. There is commonly more water in plants than in animals, with some plants (watermelons are a prime example) being more than 90% water.

Happy Studying! ^=^

C plants and animals are composed mostly of water

The answer is c) organisms that are sensitive to changes in temperature would die.