Original statement: Suntan is darkening of the skin caused by the sun. This protects the skin from sunburns.
Grammar-checked version:
Suntan is the darkening of the skin caused by the sun. It does not protect the skin from sunburns; it is a sign that the skin has been exposed to sun.
Explanation for a 7-year-old:
- A suntan happens when the sun's light touches your skin and makes it a little darker.
- A suntan is not something that protects you. It shows that your skin has been in the sun a lot.
- To stay safe, wear sunscreen, hats, and seek shade to prevent sunburns.