De or het zeeafzetting?

The correct Dutch article is:

de zeeafzetting

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

How to use zeeafzetting

the zeeafzettingde zeeafzetting
this zeeafzettingdeze zeeafzetting
that zeeafzettingdie zeeafzetting
our zeeafzettingonze zeeafzetting
your zeeafzettingjouw zeeafzetting
every zeeafzettingelke zeeafzetting
which zeeafzetting?welke zeeafzetting?
a big zeeafzetting / the big zeeafzettingeen grote zeeafzetting, de grote zeeafzetting