Answer: Advertising; journalism; politics
Explanation: Words in everyday modern speech are increasingly becoming symbols, i.e they are used as symbols. Some of the symbols used may be universal and some may be of individual importance. Some of the words used as symbols are, for example, "left-hand way", or "black mood" or "white intentions", also "it's dawned on you finally". In essence, every word is a symbol, because whenever we hear a word, a term comes to mind. However, the question here is in which fields words are used as symbols, as I have cited as examples, where words have something different meaning, therefore symbolic, in relation to how those words are used officially.
Thus, the areas where words are used as symbols are those areas where words are otherwise used as in everyday modern speech, i.e in advertising, journalism and politics. In the other areas listed, words are used as they are used when someone is officially speaking without using jargon or using word symbolism, that is, education, medicine and scientific research.