The option that can help readers define words is "parts of speech."
The answer is pronunciations. Pronunciations can help readers define words by providing them with the correct way to say a word. If a reader is unsure about how to pronounce a word, they can look it up in a dictionary or use online resources that provide audio pronunciations. By understanding the correct pronunciation, readers can then have a better understanding of the word's meaning and use it appropriately in their own speech and writing.
