In writing, what is the purpose of using prefixes?

Using prefixes serves the specific function of modifying the meaning of a word, enhancing the language by allowing for the formation of new words and concepts. Prefixes are added to the beginning of a base word to alter its meaning in a way that adds nuance or specificity; for example, adding the prefix "un-" to the word "happy" creates the word "unhappy," which conveys the opposite feeling. This process plays a crucial role in expanding vocabulary and enabling more precise communication.

The other options presented do not align with the primary function of prefixes. Clarifying the main idea, creating a strong conclusion, or introducing a new section are related to overall writing structure and coherence, which are different elements in the context of writing than the linguistic modification achieved through the use of prefixes.