De or het kustversterking?

The correct Dutch article is:

de kustversterking

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

How to use kustversterking

the kustversterkingde kustversterking
this kustversterkingdeze kustversterking
that kustversterkingdie kustversterking
our kustversterkingonze kustversterking
your kustversterkingjouw kustversterking
every kustversterkingelke kustversterking
which kustversterking?welke kustversterking?
a big kustversterking / the big kustversterkingeen grote kustversterking, de grote kustversterking