He improved business and trade.
hope i helped
Answer:
An ancient civilization from America
I believe the answer is theoretical model
A theoretical model is the foundation that could be held to support a certain theory for a certain research or study.
From the example above, the study is build on a foundation that both behavior and environmental factor could affect the subjects' overall health
Rich black soil also referred to as “The gift of the nile” they also believed the river flooded from the tears of the goddess Iris as she cried over the death of her husband Osiris.
