Correct sentence:
When tiny bits in the air tickle the nerves inside your nose, the nerves send signals to your brain. That's how you smell.
Why this is better (in simple steps):strong>
- We added a comma after the first idea so the sentence is clearer.
- We named the subject of the second part, "the nerves," so you know who is sending the signals.
- We split it into two short parts so it is easier to read and understand.
If you want it even shorter: "Tiny bits in the air tickle nerves in your nose. The nerves tell your brain, and you smell."