What is a solar eclips​

A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

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A solar eclipse is when a part of Earth is covered in a shadow cast by the moon, which sometimes fully or partially the Sun, making the sunlight go away. This will only occur if the Moon, Sun, and Earth align together.    

Explanation:

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answer; i believe that the correct answer is (b) is a factor associated with physical activity and heart disease;