[Address]
[Date]
Dear friend,

I hope this letter finds you well. I am also doing fine. Today, I am writing to tell you about an interesting topic that we learned in class today.

In our geography class, the teacher told us about natural calamities. Do you know what these are? They are harmful and sudden events that happen due to various reasons. They leave a lot of destruction behind them. You must have heard about earthquakes, floods, or droughts on the news; these are only a few examples of natural calamities. Our teacher also told us how to be safe during these, I will tell you about it in the next letter.

Tell me what interesting things you learn in your classes. Until then, take care.

Your loving friend,
[Name]