What is population density? A. the total number of people living in a certain area B. the average number of people in a given area C. the rate at which the world’s population is expected to grow D. the cultural or ethnic breakdown of people living in a country

A: the total number of people living in a certain (area)

Explanation: it's the measure of population per unit/ area

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.