De or het kustversteviging?

The correct Dutch article is:

de kustversteviging

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

How to use kustversteviging

the kustverstevigingde kustversteviging
this kustverstevigingdeze kustversteviging
that kustverstevigingdie kustversteviging
our kustverstevigingonze kustversteviging
your kustverstevigingjouw kustversteviging
every kustverstevigingelke kustversteviging
which kustversteviging?welke kustversteviging?
a big kustversteviging / the big kustverstevigingeen grote kustversteviging, de grote kustversteviging