De or het geldwerving?

The correct Dutch article is:

de geldwerving

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

How to use geldwerving

the geldwervingde geldwerving
this geldwervingdeze geldwerving
that geldwervingdie geldwerving
our geldwervingonze geldwerving
your geldwervingjouw geldwerving
every geldwervingelke geldwerving
which geldwerving?welke geldwerving?
a big geldwerving / the big geldwervingeen grote geldwerving, de grote geldwerving