De or het marktafbakening?

The correct Dutch article is:

de marktafbakening

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

How to use marktafbakening

the marktafbakeningde marktafbakening
this marktafbakeningdeze marktafbakening
that marktafbakeningdie marktafbakening
our marktafbakeningonze marktafbakening
your marktafbakeningjouw marktafbakening
every marktafbakeningelke marktafbakening
which marktafbakening?welke marktafbakening?
a big marktafbakening / the big marktafbakeningeen grote marktafbakening, de grote marktafbakening