What is the definition of Non-Fiction?

A. Light and airy, like the touch of a feather

B. Writing that is based on facts, real events, and real people, such as biography or history

C. The occurrence of the same letter or sound at the beginning of adjacent or closely connected words

D. The formation of a word from a sound associated with what is named (e.g. cuckoo, sizzle, boom, pop)