Which term refers to a heroic act or deed?

The term that refers to a heroic act or deed is 'exploit.' In this context, an exploit typically denotes a bold or daring achievement, often associated with courage or notable skill. It can be used to describe a significant accomplishment in a challenging situation, like a brave rescue or an impressive feat performed under duress. This aligns with the notion of heroism, as exploits frequently highlight extraordinary actions taken to overcome adversity or to help others.

The other terms do not share this meaning. 'Extort' relates to obtaining something through coercion, which has negative connotations. 'Extinct' refers to a species or the end of existence altogether, devoid of any heroic implication. 'Exuberant' describes a state of enthusiastic cheerfulness, which does not inherently connect with the concept of a heroic act. Thus, 'exploit' stands out as the term that accurately embodies a heroic deed.