De or het agendavorming?

The correct Dutch article is:

de agendavorming

Rule Words ending in -ing: almost always de. See the rule

How to use agendavorming

the agendavormingde agendavorming
this agendavormingdeze agendavorming
that agendavormingdie agendavorming
our agendavormingonze agendavorming
your agendavormingjouw agendavorming
every agendavormingelke agendavorming
which agendavorming?welke agendavorming?
a big agendavorming / the big agendavormingeen grote agendavorming, de grote agendavorming