A) OxygenB) Carbon DioxideC) HydrogenD) Helium 👇 Comment your answer (A, B, C, or D). ✅ Correct Answer: A 💡 Explanation: Humans need oxygen for respiration and to release energy from food.

A) OxygenB) Carbon DioxideC) HydrogenD) Helium 👇 Comment your answer (A, B, C, or D).

A) CandleB) BulbC) SunD) Torch 👇 Comment your answer (A, B, C, or D). ✅ Correct Answer: C 💡 Explanation: The Sun is a natural source of light. A candle, bulb, and torch are man-made sources.