Final answer:
To search for an exact phrase in a search engine, enclose the phrase in quotation marks. This prompts the search engine to find the exact sequence of words, providing more precise results.
Step-by-step explanation:
To search exact phrases in a search engine, the correct action is to enclose the search words in quotation marks. By enclosing words in quotation marks, you are instructing the search engine to look for the exact phrase as it is written. For example, inputting "ethics artificial intelligence" with the quotes ensures the search engine looks for sources containing that exact phrase. Boolean operators like AND, OR, and NOT are often used in conjunction with quotation marks to further refine search results and can be very useful in academic research or when trying to find specific information online.