River valley trade made them key economic areas.
Hope this helped. :)
Equator is the answer to the question
Relative dating<span> is the science of determining the</span>relative<span> order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age, (i.e. estimated age).</span>
Answer:
Perceptual region
Explanation:
A perceptual or vernacular region is defined by feelings and prejudices that may or may not be true I believe:)
