The original sentence is almost correct but could be made clearer with a few small changes. Here's a better way to say it:
Original: Mangrove trees drink salty water through their roots. They put the extra salt into their leaves and get rid of it by dropping them.
Corrected: Mangrove trees take in salty water through their roots. They move the extra salt into their leaves and get rid of it by dropping the leaves.
Explanation:
- Instead of "drink," we use "take in" because trees absorb water.
- Saying "put the extra salt into their leaves" is fine, but "move" sounds a little clearer.
- Instead of "dropping them," we say "dropping the leaves" so it's clear what "them" refers to.
This makes the sentence clearer and easier to understand!