Why Do We Need the Sun?

Answer

Generally, people need the sun because the sun provides the energy that maintains almost all forms of life on Earth. The sun is our source of natural light and warmth which is essential for survival. The sun is also important to humankind because it helps our skin manufacture vitamin D.
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The moon regulates tides and keeps the planet on a steady rotation. Without the moon, winds on Earth would exceed 100 miles per hour and would be extremely destructive.
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Photosynthesis combines water, sunlight and carbon dioxide into a chemical reaction that takes place regularly in the leaf part of the plant. Sugar and oxygen are created from this
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because without sun people will die out
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2 Additional Answers
We need the sun for life, heat, and energy. Almost all living things require the sun to live and grow. Without the sun, Earth would be freezing and dark.
The sun provides a number of valuable services. One of them is the gravity that the Earth needs to stay in orbit. If the sun ceased to exist the Earth would shoot off into space. Another of these services is light and an even more important one than the light is the nutritional benefit of sunlight for all living things, plants most especially.
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