Answer: The correct answer for the blank is-
Producers use energy from the sunlight to create food, or usable chemical energy.
Step-by-step explanation:
Producers (such as plants and algae)
are the organsisms that can synthesise their own food (either through photosynthesis that is using light or chemosynthesis, using chemical energy) using simple inorganic molecules.
In photosynthesis, producers utilize energy from sunlight in the presence of water and carbon dioxide to form food (in the form of carbohydrate), which is a usable chemical energy for them. They also release oxygen as a waste product in the surrounding in this process.