Question

photosynthesis is important to living organisms because it is the foundation of most food chains. the source of nitrogen gas in the air. how animals get carbon dioxide to breathe. the process that occurs in most ecosystems.

Explanation:

Photosynthesis is the process by which plants use sunlight, carbon - dioxide, and water to produce glucose and oxygen. Glucose serves as the foundation of most food chains as it is the primary source of energy for many organisms.

Answer:

the foundation of most food chains.