Researchers have ridden alongside motorcycle enthusiasts to understand the relationship between riders and their beloved Harley-Davidsons. This is an example of research.

ethnographic research

Explanation:

Ethnographic research commonly known as ethnography is a qualitative type of research that involves  researchers interacting and/or observing the participants involved in a study in their natural social system. Ethnographic research gives a clear and descriptive account of the culture and social life in a defined social system based several observations on what the study participants do in their natural environment being observed.

answer; the federal reserve system;