$21$ point

What are some differences between primary and secondary research?

Primary research comes before secondary research.

Primary research is direct observation, site visits, and tests, while secondary research is research that has already been reported and published. primary research is less accurate, while secondary research, because it is published, is always high quality.

Primary research is always best, while secondary research is best only if you don't have the time to do the primary work yourself.

$31$ point