If a person has an ax, and another has a knife, who can sharpen a drawing on a tree faster if it is dry?

The difference between an ax and a knife is in the thickness of the blade. That is, it is better to make small grooves in the tree with a knife and more difficult to make large ones, but with an ax the whole situation is radically opposite. Dry wood means larger pieces will be chipped off with less effort. This means that the difference between a knife and an ax is almost eliminated. But considering that a knife is still more convenient than an ax for making a drawing (unless, of course, the drawing is more than 1m2), then the answer is with a knife.