During respiration A.) carbon dioxide is used to break down glucose into energy
B.) oxygen is used to break down glucose into energy
C.) carbon dioxide and water are combined to make glucose
D.) oxygen and water are combined to make water

C6H12O6+6O2--->6CO2+6H2O+energy

Oxygen(O2) is used to break down glucose(C6H12O6) into energy so the answer is b

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.