Which sentence uses a semicolon correctly?

Mrs. Lundey noted that half the class was out with the flu; therefore, she

postponed the exam until next week.

Our plane was delayed for two hours because of the storm therefore, we

missed our connecting flight,

All of her short life; Ruth had wanted to be a surgeon and do dramatic life-

saving surgeries for patients.

Even though the sweatshirt was tattered and tom; our little dog loved to

curl up in it at night to sleep.

Mrs. Lundey noted that half the class was out with the flu; therefore, she postponed the exam until next week.

Explanation:

In this sentence, a semicolon is used to join two independent clauses whose ideas are closely related (they show a cause and effect relationship) : "Mrs. Lundey noted that half the class was out with the flu" "therefore, she postponed the exam until next week."

One of the functions of semicolons is to link two independent clauses that are closely related but that are not linked with a conjunction like and, but, or, nor, for, yet, or so. An independent clause is a group of words that have at least a subject and a verb and that express a complete thought on its own, such as the clauses above.

"Mrs. Lundey noted that half of the class was out with the flu; therefore, she postponed the exam until next week."

Explanation:

A semicolon is used when a comma or period are able to join two sentences together.