Why do living things use enzymes instead of heat as a source of activation energy?

a: adding heat does not affect how chemical reactions take place.
b: adding sufficient heat would harm or kill a living thing.
c: adding heat would not give the reactants enough energy.
d: adding heat gives reactants the wrong kind of energy.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.