What term describes a light-hearted or recreational activity for amusement?

The term that describes a light-hearted or recreational activity for amusement is "gambol." This word originates from the Middle English "gambolde," which refers to a playful leap or skip, often associated with frolicking or playing. When someone engages in a gambol, they are participating in a joyful, carefree activity that brings about enjoyment and amusement. This aligns well with the concept of light-heartedness and recreation, conveying a sense of play.

In contrast, the other terms do not fit this meaning. "Exegesis" refers to a critical interpretation or explanation of a text, particularly in religious contexts. "Harrow" can denote the act of breaking up soil, but it can also imply a sense of distress or trauma, which is far removed from amusement. "Gauche" describes someone who is socially awkward or lacking in tact, which does not relate to the idea of light-heartedness or recreational activities. Thus, "gambol" is the correct choice, reflecting the sense of playfulness and amusement intended by the question.