This is a map depicting the geographic regions of georgia.
which of these describes a similarity between regions 1,2,3, and 5?
a) they have a sparse population.
b) they are relatively flat regions.
eliminate
c) they are mostly mountainous regions.
d) they are the oldest geologic regions.

They have a sparse population.

Explanation:

Georgia includes five different geographic regions: the Appalachian Plateau, the Valley and Ridge, the Blue Ridge, the Piedmont, and the Coastal Plain.

The region depicted as number 4 is Piedmont, Georgia’s second-largest geographical region. Even though is the second largest in size, the Piedmont is home to most of Georgia's population. Most of Georgia's cities are in Piedmont, an area highly industrialized.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.