In English, what does ing represent?

A) a word
B) syntax
C) a morpheme
D) a phoneme

Morpheme

The smallest significant unit of meaning in a word (e.g., the word boys has two morphemes, boy and -s).

Phoneme

The smallest significant unit of sound in a language. Alphabetic characters roughly correspond to phonemes (e.g., apt, tap, and pat are all made up of the same phonemes).