The Investigator needs to look information and feels safe when they have sufficient data. Thy will usually do a deep dive to check out something that interests them, either way the research begins (The internet is a primary tool for Line 1 Profiles.) The investigator energy looks for the strongest materials through research to lay the information foundation for the security and safety of us all. You probably know someone who is a 1 because they are always checking everything out and letting others know what they found in their research.
An internal process for the Line 1 is space to investigate, dive into their curiosities to feel stable. They oft times have a thirst to know more, especially when it is something they are interested in.