Final answer:
The process whereby plants make food using carbon dioxide, water, and sunlight is called photosynthesis. It is essential for life on Earth as it provides energy and oxygen.
Step-by-step explanation:
The process whereby plants consume carbon dioxide, water, and the sun's energy to make food is known as: d. Photosynthesis. During photosynthesis, plants transform carbon dioxide (CO₂) and water (H₂O) into glucose (C₆H₁₂O₆), and release oxygen (O₂) into the atmosphere. This process is vital for the survival of life on Earth since it forms the basis of the food chain and produces the oxygen that most organisms require for respiration.