Correct sentence: Before they hatch, baby alligators call to their mother. She helps them by carrying them in her mouth to the water.
Why this is better (easy steps):
- Comma: We put a comma after 'Before they hatch' because that beginning part is an introduction. It needs a little pause.
- Call to their mother: Saying 'call to their mother' or 'call for their mother' makes it clear who they are calling.
- We need the word 'them': In 'carries in her mouth' we must say what she carries. So we add 'them' (the baby alligators).
- Helps how? Saying 'helps them by carrying them...' tells how the mother helps.
Another way to say it: Before they hatch, baby alligators call to their mother, and she carries them to the water in her mouth.