I used a brayer to apply Baltic Green (Liquitex), then spritzed and blotted it, first letting the water drip down the page a bit. The collage is a bit of mono-print; and the line is a blind scribble.
More Baltic Green, plus quinacridone gold (Golden Fluid Acrylics) and some gray. Mono-print collage, and graphite scribble.
The paints here are Van Dyke Brown and Quinacridone Burnt Orange with a tad of Quinacridone Gold, all Golden Fluid Acrylics. The collage is a piece of a paperback cover, and the line is graphite. Plus a little sgraffito in the paint.
Quin Gold, Van Dyke Brown, a piece of book cover, and a line done in pen.
And for the last one I decided just to play with paint.