Explanation:

Here’s how this shakes out:

- Etch – That means to cut or carve lines into a surface. You might etch a design into glass or metal, but not usually skin in the way described here.

- Tattoo – This one’s the answer. A tattoo is a permanent mark or design made on the skin by inserting pigment into the dermis layer. It’s exactly what the question describes.

- Sketch – That’s a rough or unfinished drawing. Usually done with pencil or pen, and definitely on paper, not skin.

- Drawing – This is a general term for making pictures with lines. Again, on paper, not a permanent mark on skin.