Answer:
A. oxygen and sugar are used in the process that provides energy to cells, water and carbon dioxide are given off.
Explanation:Respiration is a biochemical process that uses oxygen and glucose to generate energy with the release of carbondioxide and water. All organism respires and the oxygen is used for cellular respiration.
C6H1206 +6O2----6CO2+6H2O+Atp(energy)
The Co2 and H2O is used by plant for the process of photosynthesis in producing there food.