Which of the following was not a reason that settlers moved to the west from 1820-1860

There are traits like blood type and eye color, and others like speaking english or having a scar. what are the terms used to describe these different types of traits? how are each defined?

How and why has british society changed over the last 50 years?

How were the economies of the northern and southern states different? how ere they the same? what factors led them to develop differently?