Is the sentence correct?
Yes — the sentence is grammatically okay, but it sounds clearer if we add the word the.
Better version: A saiga’s nose warms the air and catches dust.
What the parts mean (for a 6-year-old):
- A saiga — a saiga is a kind of antelope (an animal).
- saiga’s — means the nose belongs to the saiga.
- warms the air — the nose makes cold air a little warmer.
- catches dust — the nose traps dust so the saiga does not breathe it in.
Another simple way to say it: A saiga's nose keeps air warm and traps dust.