Please answer the following question: Fact 1: Phytoplankton are bacteria and algae that use sunlight to make food. Fact 2: Sunlight beams down on the different types of algae. Given the two facts above, answer the question "Phytoplankton use what to make food?" with the following options: - sun's heat - sunlight beams - refraction of light - heat energy - visible energy - by indirect light - produce light - Positive charges
A:
sunlight beams