What term refers to the diversity of experiences and activities that prevent boredom?

The term "variety" is the best choice because it captures the essence of having a wide range of different experiences and activities, which directly correlates to preventing boredom. When we talk about variety, we mean an assortment that can excite, engage, and sustain interest, making life more enjoyable.

"Variability" refers to the quality of being subject to change or variation, often in a statistical context, and does not specifically imply diversity in experiences directly related to boredom. "Variation" denotes the process of changing or differing, but it can also lack the connotation of engaging activities. "Various," while it does imply multiple kinds of things, is an adjective that describes the quantity of things rather than the qualitative aspect of engagement or enjoyment provided by those things.

Thus, "variety" conveys the intended meaning of having numerous engaging options available, thereby effectively preventing boredom.