Which of these describes a state of being active, energetic, and alive?

The term "vitality" describes a state of being active, energetic, and alive. It captures the essence of liveliness and health, often associated with enthusiasm and a zest for life. A person with vitality typically exhibits vigor and strength, demonstrating an eagerness to engage with the world around them.

In contrast, the other options represent states that lack energy or enthusiasm. "Inactivity" suggests a lack of action or movement, indicating the opposite of being energetic. "Listlessness" describes a state of disinterest or lethargy, where one may feel an absence of energy or desire to engage. "Complacency" refers to a sense of self-satisfaction that often leads to a lack of awareness or concern for potential dangers or deficiencies, which also does not align with being active or lively.

Therefore, "vitality" stands out as the word that embodies an active and energetic state.