Which of the following describes someone who is "benign"?

The term "benign" is used to describe someone who is gentle, kind, and not harmful in nature. Therefore, the choice that best describes someone who is benign is one that captures these characteristics, highlighting kindness and a helpful disposition.

When we consider the answer that is suggested to be correct, it aligns perfectly with the definition of "benign." A helpful and kind nature signifies an absence of malicious intent and suggests a willingness to support others, which encapsulates the essence of being benign.

In the other options, while they may describe various traits, they do not match the intrinsic qualities associated with being benign. For instance, being restrained in interactions may imply a lack of openness or friendliness, lacking maturity and understanding indicates a negative trait of immaturity, and being uninhibited and wild suggests a behavior that is carefree and potentially disruptive, none of which would convey the nurturing and gentle connotation that "benign" carries. Thus, the phrase "helpful and kind in nature" is the most fitting description for someone described as benign.