Hallo Beide!
Ich würde in dem Zusammenhang vielleicht auf "make an effort" verzichten, weil es ja doch mehr "sich anstrengen, um etwas zu schaffen" beschreibt. Vielleicht ist "look after/care about/support/be there for" u.ä. besser geeignet?
Make sure to look after those who looked after you
Make sure to care about those who cared about you
Make sure to support those who supported you
Make sure to be there for those who were there for you
Best wishes,
Duckduck