The force of gravitation exists

Options

A. everywhere in the universe
B. at the surface of the earth only
C. inside the earth only
D. at the surface of moon only

Explanation

To solve the question "The force of gravitation exists," we need to analyze the options provided and determine where the gravitational force is applicable.

### Step-by-Step Solution:

1. **Understanding Gravitational Force**:
- The gravitational force is an attractive force that exists between any two masses. According to Newton's Universal Law of Gravitation, this force is given by the formula:
\[ F = \frac{G \cdot m_1 \cdot m_2}{r^2} \]
where \( F \) is the gravitational force, \( G \) is the gravitational constant, \( m_1 \) and \( m_2 \) are the masses of the two objects, and \( r \) is the distance between the centers of the two masses.

2. **Analyzing the Options**:
- **Option 1: Everywhere in the universe**: This option suggests that gravitational force exists at all locations in the universe, regardless of the bodies' positions.
- **Option 2: At the surface of the Earth only**: This option limits the existence of gravitational force to just the surface of the Earth.
- **Option 3: Inside the Earth only**: This option suggests that gravitational force exists only within the Earth's interior.
- **Option 4: At the surface of the Moon only**: This option limits gravitational force to just the surface of the Moon.

3. **Evaluating Each Option**:
- **Option 1** is correct because gravitational force acts between any two masses, regardless of their location in the universe.
- **Option 2** is incorrect because gravitational force also exists inside the Earth and beyond its surface.
- **Option 3** is incorrect for the same reason; gravitational force exists outside as well as inside the Earth.
- **Option 4** is also incorrect because gravitational force exists not only on the Moon's surface but also in its vicinity and throughout the universe.

4. **Conclusion**:
- The correct answer is **Option 1: Everywhere in the universe**. Gravitational forces act between all masses, whether they are on the surface of Earth, inside Earth, on the Moon, or anywhere else in the universe.