Spelling and pronunciation, while important to respect both orthography and phonetics, are not key elements to <em>understanding the meaning </em>of a word. The context, however, used to explain the setting of an event or an statement, is what truly matters when trying to convey an idea so that it can be comprehended by the reader.
The correct answer for the question that is being presented above is this one: "context." Very often a reader can determine the meaning of a word by studying the word's structure and <span>context. Regarding the spelling and pronunciation, it doesn't have to do in order to get and to know the meaning.</span>
This answer may depend on your curriculum, but to assure that your paper is accurate you should have looked up what you're writing about and source your sites so that you know you are getting all your answers truthfully.