Dwarves = Mountains

>Dwarves = Mountains
>Elves = Forests
>Humans = Plains
>Orcs = ?

Desert.

Graves.

Desert /badlands

wastes or badlands

Swamps.

And merfolk get Islands.

Savannah plains, tundra, rainforests etc.
Pretty much any landscape with aggressive wildlife.

I see what you did there.

In the Sovereign Stone series orks are seafaring pirates with water magic.

this man gets it