Let's look at your sentences and make them clearer and grammatically correct.
Original: "Deserts are very wind and dry. Rains are rare and important for everyone who lives there. Plants have special ways to save water."
Corrected:
"Deserts are very windy and dry. Rain is rare and important for everyone who lives there. Plants have special ways to save water."
Explanation:
- "wind" should be "windy" because we need an adjective to describe the deserts.
- "Rains" should be "Rain" because rain is usually uncountable here.
- The rest looks good and makes sense!
Keep practicing your wonderful descriptions!