Final answer:
The appropriate type of oxygen to use for a patient breathing effectively is room air. If a patient is not breathing effectively, 100% oxygen can be administered.
Step-by-step explanation:
When a patient is breathing effectively, the appropriate type of oxygen to use is room air, which consists of about 21% oxygen. This is because the patient's lungs are functioning properly and able to take in sufficient oxygen from the environment. If a patient is not breathing effectively and needs supplemental oxygen, then 100% oxygen can be administered.