Answer: Principle/ A.. sorry if it's wrong can't decide between A and D
Explanation:
Raw cotton crops doubled each decade after 1800 because farmers grew nothing else. The cotton gin sped production and the "de-seeding" of cotton so much that the economy improved so farmers stuck with cotton.
Hope this helps! :)
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
Answer:
I lije happy and Peace society whre I can live safely without any <em><u>conflict</u></em><em><u>.</u></em>