Which of the following includes root words, prefixes, and suffixes?

The correct answer is morphology, which studies the structure of words, including the formation and composition of root words, prefixes, and suffixes. Morphology examines how these elements combine to create meaning and how they function within language. Understanding morphology is essential for recognizing how words are formed and how they relate to each other in context.

Root words serve as the base of a word, while prefixes are added to the beginning, and suffixes are added to the end to modify meaning or function. An example of this would be the root word "educate," to which the prefix "un-" (as in "uneducated") and the suffix "-tion" (as in "education") can be added, demonstrating how morphology structures word formation.

By grasping these concepts, students can improve their vocabulary, spelling, and comprehension skills, making morphology foundational to language arts education. Understanding other areas like grammar, phonetics, and syllabication are also important, but they do not specifically encompass the study of word structure to the same degree that morphology does.