The first piece is an ink drawing. I used a black marker to color in the horizon as well as the bear on the bottom. I also cross hatched the trees and cliff to add dimension.
For the second piece I incorporated both ink and watercolor. I layered different colors to add depth and finalized the details wink a nib pin.
The third artwork is an ink wash. I layered the ink in certain areas to add dimension and make the objects less flat. I cross hatched the cliffs to add detail.