Frown is to smile as continue is to what?

The relationship between "frown" and "smile" represents two opposing facial expressions conveying different emotional states. A frown typically indicates displeasure or sadness, while a smile generally signifies happiness or contentment. This contrast highlights a fundamental transformation from one state to another.

In the analogy, "continue" implies an extension or ongoing action, which is fundamentally at odds with the concept of "terminate." To terminate means to bring something to an end or to cease an action. Therefore, just as a frown is the opposite of a smile, to continue doing something is the opposite of terminating that action. The correct relationship between these pairs reflects a similar contrast, emphasizing a shift from ongoing to an endpoint.

The other options—lengthen, deviate, and prolong—do not convey the same oppositional relationship to "continue" as "terminate." Lengthen and prolong suggest extending an action, while deviate implies moving away from a path but doesn't serve as a direct opposite to continue. These distinctions clarify why "terminate" aligns correctly with the given analogy.