The correct products of respiration are c. carbon dioxide, water, and energy.
During cellular respiration, glucose (or other organic molecules) is broken down, and the main products are carbon dioxide (CO2), water (H2O), and energy (in the form of ATP).
Option a (water and energy) is partially correct but incomplete, as it omits carbon dioxide. Option b (carbon dioxide and water) is also partially correct but omits energy. Option d (carbon dioxide, water, and glucose) is incorrect because glucose is not a product of respiration; it is a reactant.