If a nucleus were as big as a nonpareil, what would a strand of hair be the size of

c is the answer because when something is left after something evaporates that shows the chemical change.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.