Jamʿ gathers several subjects under a judgment. Tafriq separates members of a common kind by a significant distinction. Taqsim lays out the relevant classes or states of a subject.
“Reading, writing, and reflection support learning” has the character of jamʿ.
“Questions and objections are both speech acts, but one seeks clarification and the other challenges a claim” exemplifies tafriq.
“Questions can be informational, clarificatory, or critical” illustrates classification, provided the criterion is properly defined.
A mere list does not determine the device; the discursive purpose matters.