Answer:
The correct option is C.
The respiratory and digestive systems work together
to make usable ATP energy for cells.
Explanation:
DIGESTIVE SYSTEM is the System the body that help to breakdown compound molecules into smaller pieces that can easily by absorbed by the body hence release nutrients and ATP. Energy are stored as glucose and resuable as ATP.
RESPIRATION is a process whereby oxygen is inhaled and it help to breakdown large compounds to release energy (ATP) and carbon dioxide is released. Both system work together to release ATP for cells.
Therefore , The respiratory and digestive systems work together
to make usable ATP energy for cells. Is the correct option.