Correct Answer: Simple

Solution : The correct choice is the third option.

Simple implies clarity, ease, and a lack of complexity, contrasting with the intricate and complicated nature associated with a tangle. Simple is the most appropriate antonym, as it contrasts with the complexity and disorderliness implied by the word tangle.

The meanings of the other options are as follows:

• Jam implies a state of congestion or entanglement.
• Labyrinth suggests a complex and confusing network of paths, which aligns with the idea of something being tangled.
• Coil is associated with winding or twisting.

Therefore, the correct answer is simple.