Final answer:
A prefix is an example of a morpheme, which is the smallest unit of language that carries meaning.
Step-by-step explanation:
A prefix is an example of a morpheme.
A morpheme is the smallest unit of language that carries meaning. It can be a whole word or a part of a word, such as a prefix or a suffix. In this case, the prefix "pre-" is added to a word to change its meaning or create a new word.
An example of a word with the prefix "pre-" is "preview." The prefix changes the meaning of the word to refer to something that happens before or in advance.