Final answer:
Adjectives occur in three degrees of comparison: positive, comparative, and superlative. They modify nouns and are essential for providing detailed and expressive communication.
Step-by-step explanation:
Similar to articles, adjectives occur in all three degrees of comparison. The three degrees of comparison for adjectives are the positive degree, which is the adjective in its simple form, used when no comparison is being made (e.g., 'small', 'fast'); the comparative degree, which is used to compare two things and usually ends in -er or is preceded by 'more' (e.g., 'smaller', 'more interesting'); and the superlative degree, which is used to compare three or more things and usually ends in -est or is preceded by 'most' (e.g., 'smallest', 'most exciting'). Adjectives enhance the meaning of nouns by providing additional information about them, making our communication clear and expressive.