The U.S. government uses body mass index to estimate a person's body weight status.
The most obvious reason is that one has to pack up and go because things are not so good at home. Long ago, that probably meant that the climate had changed and made life impossible. It might have become too hot or too cold or too wet, which in turn would have affected not only quality of life but also make survival a shaky proposition. Drought, flood, and temperature changes could certainly push people to move on.
I hope that helped a little.
Answer:
The Constitution has three main parts. First is the Preamble, an introduction that states the goals and purposes of the government.
Constitution is a supreme law that is binding even on the government. A constitution defines a state and the rights of its citizen. In a democratic order, the Constitution ensures that the people ultimately control the Government.
Subjective experience, physiological response, and behavioral or expressive component
