If a person lives in Houston, then they live in Texas is the correct grammar using if and then.
Why if are used in the sentence?
When introducing the conditions under which an event or scenario might occur, might be occurring, or might have occurred, use if. If I leave her out, she becomes quite agitated.
If you work on finding answers to your troubling issues, you'll feel much better about yourself. You may leave if you choose.
Thus, the statement has made above.
For more details about if are used in the sentence, click here:
https://brainly.com/question/9983401
#SPJ1
