What role does ervan have here? Van + preposition? This whole sentence is hard to translate

What role does ervan have here? Van + preposition? This whole sentence is hard to translate

houden (+ van) = to love; to like
Ik hou van jou = I love you
ervan = van het
Ik houd ervan = I love it.
Ik houd ervan om … te = I like to [do something] / I like [doing something]
Ik houd ervan om met jou te praten = I like talking to you
Ik houd ervan om nieuwe dingen te leren = I like learning new things
Ik houd ervan om anderen te helpen met hun problemen = I like helping others with their problems
Ik houd ervan om musea te bezoeken = I like visiting museums
Ik houd ervan om te sporten = I like playing sports

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