How is the term "torpid" best defined?

The term "torpid" is best defined as being without energy and sluggish. It describes a state of inactivity or lethargy, where an individual or an entity lacks vitality or vigor. This aligns with the general use of the word in various contexts, which emphasizes a sense of sluggishness or a lack of physical or mental activity. For example, one might feel torpid after a long period of rest or inactivity, highlighting the absence of energy and engagement.

In this context, the other options imply qualities that directly contrast with the meaning of "torpid." Being active and lively suggests energy and movement, while thoughtful and reflective indicates mental engagement and activity. Excited and fervent conveys a strong emotional or energetic state, further opposing the sluggishness implied by torpid. Thus, the selection of the definition that embodies lack of energy makes "torpid" correspond closely to option C.