Please choose the correct ending to complete the given sentence: Health: [header] How to use watercolor pencils [title] Use watercolor paper or heavy board to draw on. [step] Because watercolor pencils eventually require the application of water, you'll want to draw on material thick enough that it won't tear. Watercolor paper or heavy board are great choices.

Ending1: [substeps] Paper works best for watercolor pencils, because it will resist tearing and will make your chosen pencil harder to shape. You may want to keep the paper thin enough to cover the pencil surface, but thick enough to stick to it completely, but not so thick that it cuts down the color barrier. Ending2: [substeps] For hard surfaces, such as wood or even canvas, use any shade of straw color that you like. This way, the watercolor doesn't have to be a bright neon color. Ending3: Or, whatever form of paper is available to you, write down which one you are interested in by doodling on the paper. [substeps] If you are coloring with watercolor pencils, add some color. Ending4: [substeps] If you prefer a smoother surface than watercolor paper has, you can draw on illustration boards. They are thick enough to handle the application of water, but are much smoother than watercolor paper.

Answer format: ending1/ending2/ending3/ending4