Which word best describes a verbal expression of approval or praise?

The term that best describes a verbal expression of approval or praise is "compliment." A compliment is a form of positive expression, often involving words that commend or appreciate someone's effort, value, or qualities. When someone gives a compliment, it demonstrates recognition and approval, making it synonymous with praise.

In contrast, the other options illustrate different types of interactions or expressions that do not align with the notion of approval. Criticism refers to the act of expressing disapproval or pointing out faults, while acknowledgment signifies recognition but lacks the inherently positive connotation of praise. Condemnation is a stronger term associated with denouncing or disapproving harshly, which is clearly opposite to expressing approval. Therefore, "compliment" is the definitive choice for a verbal expression that embodies appreciation.