Question

How does our body obtain energy?

• A. Food
• B. Water
• C. Air
• D. Sunlight

Answer 1

The correct option is: B

Explanation of the correct option:

The food we eat gets digested into simpler nutrients. These simpler nutrients diffuse into cells where they break down in the presence of oxygen and release some amount of energy with carbon dioxide and water. This process is called cellular respiration.

Explanation of the incorrect option:

Option A: Sunlight is the ultimate source of energy. but the human body can not absorb energy directly. The green plants use this energy to prepare food with inorganic substances like carbon dioxide and water.

Option C: Humans do not get energy from water.

Option D: Humans do not get energy from air.

Final answer: Our body obtains energy through food.