The turbulent waves, gleaming in the sunlight, pounded the barren

beach.
a. sentence is correct as shown
b. sentence is incorrect

a. sentence is correct as shown.

a. Sentence is correct as shown.

The correct answer is b. sentence is incorrect.

This sentence is missing a subject, which is essential for a complete sentence. To make it a correct sentence, we need to add a subject. For example:

"The turbulent waves, gleaming in the sunlight, pounded the barren beach."

or

"The turbulent waves, which were gleaming in the sunlight, pounded the barren beach."

These revisions provide a subject ("waves") that is performing the action in the sentence.