Question

word meanings quick check
in the word unsustainable, the un-, sustain, and -able are all examples of (1 point)

• affixes.
• base words.
• roots
• morphemes.

Explanation:

To solve this, we analyze each term:

• "un - " is a prefix (an affix), "sustain" is a root/base, and " - able" is a suffix (an affix). Morphemes are the smallest meaningful units of language, which include roots, prefixes, suffixes, etc. Affixes are a type of morpheme but "un - ", "sustain", and " - able" together include a root and affixes, all of which are morphemes. Base words are complete words, and roots are part of morphemes. So the correct category is morphemes.

Answer:

D. morphemes