Why wouldn't this be "une variété...a fait"? It's "variety" that is the subject of the sentence, and not the prepositional clause "of programs," is it not?
Freeform Writing Exercise B2
Chan, it depends on the structure, but in this case it is agreement with the plural complement ‘ programmes télé ’ that is correct - emphasising that ‘television programs are made’. (Note that ‘télé’ is invariable, but the expression ‘programmes télé’ is in the plural form).
This grammatical question has been addressed previously here, but I can’t find links on search currently.
The link below however gives examples that demonstrate related usage
English has this conundrum with collective nouns also :
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