Which punctuation change will correct this sentence my parents are very strict for example you can only watch one hour of TV each morning?

The correct punctuation change is to add a colon after "strict" and remove the period after "example." This will make the sentence read:

My parents are very strict: for example, you can only watch one hour of TV each morning.

Here's why:

* Colons are used to introduce a list, explanation, or example. In this case, the phrase "for example" indicates an example of the parents' strictness.

* The period after "example" is unnecessary because the phrase "for example" is part of the same sentence.