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.