““…Tattha katame kusalamūlā? Alobho, adoso, amoho—ime vuccanti “kusalamūlā”. …”
That is the uddesa version of the explanation.
– It needs to be explained in niddesa (more clarification) and patiniddesa (clarification with examples) versions, as needed.
– That is what is done with verbal discourse or a post (a series of posts in the case of patiniddesa).
See, “Sutta – Introduction“