The correct answer is option 3: Africa and South America.

Option 1, North America and South America do not form a mirror image of each other. While they are geographically connected, their shapes and positions are not symmetrical.

Option 2, Asia and Africa are not mirror images of each other. They are both part of the same landmass called Afro-Eurasia, but their shapes are different.

Option 3, Africa and South America do form a mirror image of each other. If you look at a world map or a globe, you will see that the western coast of Africa and the eastern coast of South America fit together like puzzle pieces. This phenomenon is known as continental drift or plate tectonics, where the land masses on Earth`s surface move slowly over time.

Option 4, Europe and Asia are not mirror images of each other. They are both located on the same landmass, called Eurasia, but their shapes and positions are not symmetrical. Europe is located to the west of Asia, and their coastlines are different.

In conclusion, the correct answer is option 3: Africa and South America, as they are the continents that form a mirror image of each other.