他故意踩我的脚，这明显是一种挑衅。

He stepped on my foot on purpose, which was a clear ___provocation.

他的挑衅言论引发了激烈的争论。

His ___provocation led to a heated argument.

他在会议上故意打断领导的发言，这被视为一种挑衅。

His intentional interruption of the leader's speech at the meeting was seen as a ___provocation.