Question

which of the following is a sentence fragment?
marina is a fast runner and a skilled basketball player.
marina, an excellent basketball player.
marina has very strong basketball skills.
marina, a great basketball player, scored 26 points today.

Explanation:

A sentence fragment lacks a subject - verb combination to form a complete thought. "Marina, an excellent basketball player." is just a noun phrase and does not have a verb to make it a complete sentence. The other options have subject - verb combinations and express complete thoughts.

Answer:

Marina, an excellent basketball player.