Seasonal variations on Earth occur due to its

Options

A. tilted axis
B. rotation around its own axis
C. revolution around sun
D. both (a) and (c)

Explanation

**Step-by-Step Solution:**

1. **Understanding Seasonal Variations**: Seasonal variations on Earth refer to the changes in weather patterns and temperatures that occur at different times of the year. These variations lead to distinct seasons such as spring, summer, autumn, and winter.

2. **Key Factors Influencing Seasons**: The primary factors that contribute to seasonal variations are:
- The tilt of the Earth's axis.
- The revolution of the Earth around the Sun.

3. **Tilt of the Earth's Axis**: The Earth is tilted at an angle of approximately 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, leading to changes in temperature and daylight hours, which are essential for defining seasons.

4. **Revolution Around the Sun**: The Earth takes about 365.25 days to complete one full orbit around the Sun. As it revolves, the tilt of its axis causes different hemispheres to experience different seasons at the same time (e.g., when it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere).

5. **Conclusion**: Therefore, the seasonal variations on Earth occur due to both the tilt of the Earth's axis and its revolution around the Sun. The rotation of the Earth on its own axis does not directly cause seasonal changes.

6. **Answer Selection**: Based on the options provided:
- Option 1: Tilted axis (correct)
- Option 2: Rotation around its own axis (incorrect)
- Option 3: Revolution around the Sun (correct)
- Option 4: Both A and C (correct)

The correct answer is **Option 4: Both A and C**.

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