Final answer:
The sentence that is punctuated incorrectly lacks parallel structure due to the incorrect conjunction usage.
Explanation:
The sentence that is punctuated incorrectly is: lan practiced karate; and he was a black belt.
In this sentence, the conjunction 'and' creates a lack of parallel structure between the clauses, making it incorrect.
To correct it, you can use: lan practiced karate; he was a black belt.
Learn more about Punctuation errors in sentences here:
https://brainly.com/question/12690525
