Days are longer than night in summer because of the tilt of the Earth's axis. During summer, the Earth's axis is tilted towards the Sun, causing the Sun to be higher in the sky and resulting in longer days. Here is a detailed explanation:

1. Earth's Tilt:
- The Earth is tilted on its axis at an angle of approximately 23.5 degrees.
- This tilt is the reason why we have different seasons throughout the year.

2. Summer Season:
- During the summer season, the hemisphere that is tilted towards the Sun experiences summer.
- In the northern hemisphere, summer occurs from June to August, while in the southern hemisphere, it occurs from December to February.

3. Longer Days:
- When the hemisphere is tilted towards the Sun, the Sun appears higher in the sky, and its rays are more direct.
- This results in the Sun's rays spreading over a larger area, causing the daylight hours to be longer.
- As a result, we experience more hours of daylight during summer, making the days longer than the nights.

4. Sun's Path:
- During summer, the Sun takes a higher path across the sky, which means it stays above the horizon for a longer duration.
- The Sun rises earlier in the morning and sets later in the evening, giving us more daylight hours.

5. Effect on Activities:
- Longer days in summer provide more time for outdoor activities, such as playing sports, going to the beach, or enjoying picnics.
- Farmers also benefit from longer daylight hours as it allows their crops to receive more sunlight for growth.

In conclusion, the correct option is 'A' - Days are longer than night in summer. This is due to the tilt of the Earth's axis, which causes the Sun to be higher in the sky, resulting in longer daylight hours.

In summer, days are longer than the nights.