1. READ/play the text
2. CLICK the picture (and video)
3. TRY this:

Q1: Where does most of the world's light come from?

[Answer]

The Sun is the most powerful light in our world.

The Sun is far away, but it is so big and bright that it even gives light when the sky is cloudy.

It is much brighter than torchlight. This is why you cannot see a torch beam in daylight.

Sunlight is so powerful we must never look at the Sun or it may hurt our eyes.