The boolean operator that omits information from the research parameters is "Not."
The boolean operator that omits information from the research parameters is the "Not" operator. When using the "Not" operator, you can exclude certain words or phrases from your search results. This helps to narrow down the search and retrieve more specific information by excluding certain terms that you don't want to appear in the search results. So, in this case, the correct answer is option 4, "Not."
