Question

which of the following does not indicate that an image has been altered? unnatural colors crisp image of a person with a blurred background distorted background no lines or pores on a persons face

Explanation:

Unnatural colors, distorted backgrounds, and lack of facial lines/ pores can be signs of image - alteration. A crisp image of a person with a blurred background (a common effect in photography using shallow depth - of - field) is not necessarily an indication of image alteration.

Answer:

Crisp image of a person with a blurred background