What word is used to describe something that tends to inflame or provoke?

The term "incendiary" is used to describe something that tends to inflame or provoke, often in a figurative sense. It originates from the word "incendiary," which refers specifically to something that can ignite flames or cause fire. In a broader context, however, the word is applied to ideas, comments, or behaviors that are likely to stir up intense emotions, such as anger, conflict, or unrest. For example, incendiary speech can incite passionate reactions from an audience, leading to heightened tensions or even chaos.

In contrast, the other terms listed do not convey the same provocative connotation. "Tranquil" describes a state of calm and peace, "calming" suggests soothing effects, and "neutral" indicates a lack of bias or involvement. None of these words imply a tendency to inflame or provoke, which reinforces why "incendiary" is the correct choice for this question.