Answer true or false.
Sun is the ultimate source of energy.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks whether the statement "Sun is the ultimate source of energy" is true or false.

2. **Defining Ultimate Source of Energy**: An ultimate source of energy is one that does not rely on any other source for its energy. It generates energy independently.

3. **Examining the Sun**: The Sun is a star that produces energy through nuclear fusion processes occurring in its core. This process generates a tremendous amount of energy that radiates out into space.

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