Final answer:
The correct description of respiration is that oxygen and glucose are utilized to provide energy to cells, with carbon dioxide and water being released as waste products (Option a).
Step-by-step explanation:
Cellular respiration is the metabolic process by which cells obtain energy. In this process, oxygen and glucose are used to create ATP, which is the energy currency for cells. Through a series of biochemical reactions, these substances are broken down, releasing carbon dioxide and water as waste products. The correct answer to the question is 'a) Oxygen and sugar are used in the process that provides energy to cells; water and carbon dioxide are its waste products.'
This process is essential for all living organisms as it provides the necessary energy to fuel cellular activities. It complements photosynthesis, where plants create glucose and oxygen from carbon dioxide and water using sunlight. Thus, cellular respiration and photosynthesis form a cycle, sustaining life on Earth as we know it.