Correct Answer: Ripe

Solution : The correct antonym is the second option.

Explanation : In the given context, "crude" suggests something that is in a raw or unrefined state. It might be lacking in sophistication or maturity. The antonym "ripe" is a fitting choice because it conveys the idea of something being fully developed, mature, or refined. In the progression from crude to ripe , there is an implication of growth, development, and refinement.

The meanings of the other option are as follows:
Beastly : This word means resembling a beast and is often used to describe behaviour or appearance.
Stubble : This word refers to the short stalks left in a field after harvesting.
Intense : This word means having a high degree of intensity or strong feelings.

Therefore, the correct antonym is ripe.