Final answer:
The main component of the cytosol is water, which makes up about 80 percent of its composition and is essential for cellular functions and processes.
Step-by-step explanation:
The main component of the cytosol is water. Cytosol, the liquid part of the cytoplasm, is composed of about 80 percent water and is essential for maintaining the cell's internal environment. It contains various substances like dissolved salts, fatty acids, sugars, amino acids, and proteins such as enzymes. These components are crucial for metabolic processes, including breakdown of molecules and protein synthesis, occurring within the cell. The enzymes in the cytosol play a significant role in speeding up chemical reactions necessary for the cell's survival and functioning.