Question

which tool create a duplicate copy of one part of an image over another part of the same image​

Answer 1

clone tool you need to define the source part which you can select using pressing the alt+click and after defining the soure when you click than the part will be copied at the position of your click. The Clone Stamp tool duplicates one part of an image to another part of the same image by way of a brush

Answer 2

Explanation:

Clone stamp tool allows you to copy one area of an image onto another area of an image.