Which aspect of language encompasses nouns, pronouns, and adjectives?

The correct answer identifies the category that includes nouns, pronouns, and adjectives as parts of speech. Parts of speech are the foundational building blocks of a language, categorizing words based on their functions in sentences. Nouns represent people, places, things, or ideas; pronouns are words that take the place of nouns; and adjectives describe or modify nouns, providing additional information about them. Recognizing these categories is essential for understanding sentence structure and grammar.

The other options highlight different elements of language. Syntax refers specifically to the arrangement of words and phrases to create well-formed sentences. Grammar is a broader term that encompasses the structure and usage rules of language as a whole, including but not limited to parts of speech. Vocabulary, on the other hand, relates to the collection of words and their meanings. Thus, while all these aspects are essential to language, only parts of speech specifically denote the group that includes nouns, pronouns, and adjectives.