De or het vetophoping?

The correct Dutch article is:

de vetophoping

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

How to use vetophoping

the vetophopingde vetophoping
this vetophopingdeze vetophoping
that vetophopingdie vetophoping
our vetophopingonze vetophoping
your vetophopingjouw vetophoping
every vetophopingelke vetophoping
which vetophoping?welke vetophoping?
a big vetophoping / the big vetophopingeen grote vetophoping, de grote vetophoping