Point out one distinctive detail in this image that makes this "anime" artstyle

Top one, Is that the eyebrow? Not the eye, certainly.

Bottom one. Ah, below hair.

What, is it just one thing what makes it all?

Oh look, your picture has eyes. This one has, too.

 Is this anime?

If you add all the features together you get a unique image, so you'll have to stick with one at a time. The rules of the game says to point out a detail.