4. What is a solvent?

something in which you dissolve another substance/able to dissolve other substances.

Explanation:

Some examples of solvents are water, ethanol, toluene, chloroform, acetone, milk, etc.

Algae, just like plants, make food using their chlorophyll and chloroplasts in a process called photosynthesis. Chlorophyll captures the Sun's energy and uses it to make sugars out of carbon dioxide from the air and water. The sugar is energy for the algae to continue producing sugar and growing. :)