Answer:
by the rotation of the Earth on its axis
Explanation:
The structure that is labelled C would be a protein, a specific type of protein that helps in regulating the transport of substances in and out of the cell.
Producers, also known as autotrophs, make their own food. They make up the first level of every food chain. Autotrophs are usually plants or one-celled organisms. Nearly all autotrophs use a process called photosynthesis to create “food” (a nutrient called glucose) from sunlight, carbon dioxide, and water.