Mountains and oceans separated the Roman, Chinese and other civilizations, but for thousands of years, the Silk Roads shaped this civilizations in what way?

This term refers to the number of people per unit area (usually a kilometer or a mile). this could refer to the number of people per square mile in a city, a county, a province, a state, or a nation.

What did passage of the immigration act of 1965 accomplish? the law lowered the number of asians allowed to immigrate to the us. the law allowed no more immigration from european nations. the law supported victims of political persecution. the law made an effort to establish a quota system.

Me with this psychology homework, i’m struggling with it.