Correct option is B
The correct option that rectifies the highlighted part of the sentence is (b) "a universal."
Explanation: The phrase "a universal entertainment" is correct because "universal" is an adjective that requires an article ("a") before it. In this context, "a universal entertainment" means a type of entertainment that is universally appealing.
Corrected sentence: "Cinema provides a universal entertainment."
Example: Cinema provides a universal form of entertainment that appeals to all cultures.