Producers use energy from the sun to create or usable chemical energy.

The correct answer for the blank is-

Producers use energy from the sunlight to create food, or usable chemical energy.

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.

they are known to reach a speed of 21 miles per hour