Which definition best matches "gratuitous"?

The term "gratuitous" best aligns with the definition of being unwarranted or unnecessary. In various contexts, it is often used to describe something that is given or done without any justification or reason, such as gratuitous violence in media, which refers to violence that is excessive and not essential to the narrative. This connotation suggests that the act or thing in question lacks a purpose or rationale, making it superfluous.

In contrast, the other options imply a level of importance or benefit that does not correspond to the essence of the word "gratuitous." Necessary and essential imply a requirement, while helpful and beneficial suggest a positive contribution. Supportive and encouraging highlight a sense of aid or empowerment, which contradicts the notion of being unnecessary or uncalled-for inherent to "gratuitous." Thus, recognizing the absence of necessity is key to understanding why the second definition is the most accurate match for the term.