In respiration you take in glucose and oxygen and release CO2 and water. Also in the process energy is released. So the answer is B.
<span>Enzymes are biological catalysts (they are proteins). Enzymes regulate metabolic pathways in the body.
e.g. Digestive enzymes in your stomach speed up the hydrolysis and breakdown of carbohydrates, proteins and fats in the food you consume.</span>
That would be geographical information systems (aka GIS).
