Which term would best describe a response that lacks interest or engagement?

The term "laconic" refers to a style of speaking or writing that is concise and to the point, often conveying a sense of disinterest or lack of engagement. A laconic response typically consists of few words and can come across as brusque or indifferent, suggesting that the speaker does not wish to elaborate or engage further in the conversation. This aligns perfectly with the idea of a response that lacks interest.

In contrast, the other terms denote positive engagement or verbosity. "Verbose" describes a tendency to use more words than necessary, often leading to a lack of clarity rather than disinterest. "Enthusiastic" conveys a high level of interest and engagement, and "dynamic" implies active energy or change, which is also opposite to a lack of interest. These distinctions help clarify why "laconic" is the most fitting choice for a response that is lacking in interest or engagement.