If the artist likes to create large works and wants the ability to erase, Soft Pastel would be the best choice among the options provided. Soft pastels allow for broad, expressive strokes suitable for large pieces, and they can also be blended with fingers or tools. While they are not as easily erasable as pencil or certain other media, they can be gently smudged or brushed off to achieve lighter areas or corrections.
Colored pencils and markers generally do not lend themselves well to erasing, and oil pastels are more difficult to erase and manipulate on large surfaces.