Answer:
Option D. To figure out how to correctly speak the word onomatopoeia, you look up the word in your dictionary. You then refer to a chart that explains the dictionary's symbols for how to say the word. This chart is called the dictionary's pronunciation key.
Step-by-step explanation:
The pronunciation key is a chart present in most dictionaries that explain and help the reader to learn the correct pronunciation for any word that is found within the dictionary. The explanation and pronunciation given by the dictionary try to avoid any regional or socially marked forms of pronouncing words, while including the most common variants for each word. When using an online or digital dictionary, the pronunciation key is found next to each word in the form of a play icon. By clicking on that play icon the reader can hear the correct pronunciation of the chosen word.