What are the reasons for Earth's uniqueness among planets and why is food necessary?

Here are the solutions to the questions:

2. What drives human to explore and ask questions from a young age?

• (a) Necessity
• (b) Curiosity
• (c) Education
• (d) Environment

Humans are naturally driven by an innate desire to learn and understand, which is called curiosity.

The correct option is $\boxed{\text{b}}$.

3. Food is necessary because

• (a) it provides growth
• (b) it provides energy
• (c) it keeps us healthy
• (d) All of these

Food is essential for providing nutrients for growth, supplying energy for bodily functions, and maintaining overall health.

The correct option is $\boxed{\text{d}}$.

4. Why is earth considered unique among the planets in the Solar System?

• (a) It is the only planet known to have a rocky surface.

❌ Incorrect.
Option (a) is incorrect because planets like Mars, Venus, and Mercury also have rocky surfaces. Earth is considered unique primarily because it is the only planet known to support life, due to the presence of liquid water, a suitable atmosphere, and a moderate temperature range.