In the context of verb tense and voice, the sentence that best exemplifies a lively and active voice is: "A machine mixes the concrete with water."
Explanation:
1. In an active voice sentence, the subject performs the action directly on the object. This creates a more engaging and dynamic sentence structure.
2. In the sentence "A machine mixes the concrete with water," the subject "machine" is clearly performing the action of mixing the concrete.
3. The sentence is straightforward, lively, and conveys a sense of action and movement.
4. By contrast, the other sentences either lack the direct action of the subject on the object or are in a passive voice, which tends to be less engaging and active.
Overall, the sentence "A machine mixes the concrete with water" stands out as the best example of a lively and active voice due to its clear subject performing the action.
