Why is it important to select the right project before you begin working?

Because otherwise you could've wasted all of your time working on something you didn't even need to work on which could cause late or overdue assignments, bad grades, and falling behind.

Asolar 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.