Question

which is a common type of map projection?
○ distorted
○ digital
○ curved - surface
○ equal - area

Explanation:

Map projections are methods to represent the curved Earth on a flat surface. "Distorted" describes a property of all projections, not a type. "Digital" refers to the format of a map, not a projection type. "Curved-surface" is the opposite of what a projection achieves (flattening). Equal-area is a defined category of map projection that preserves the relative area of regions.

Answer:

equal-area