Which action does 'intervene' describe?

The term 'intervene' is accurately captured by the idea of coming between and potentially altering an event's course. This means that when someone intervenes, they are stepping into a situation with the intention to influence or change its outcome. This could apply in various contexts, such as mediating a conflict, stepping into a conversation to provide input, or even in legal or educational frameworks where a person or body might intervene to improve a situation or enforce rules.

The other options do not align with the meaning of 'intervene.' Approving a decision implies consent or agreement rather than altering it. Joining a group suggests participation without any indication of changing dynamics. Dismissing an argument involves rejecting it outright rather than intervening to alter the discussion or situation. Therefore, the correct interpretation of 'intervene' relates to actively engaging in a scenario to modify its development or resolution.