What is it meant by the term "social heterogeneity" in reference to urban settlements?

Where does the availability of water pose the greatest problem

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

Which statements describe cultural influences? florida is bordered by water on three sides. french is spoken in parts of louisiana. forests are cleared to provide space for cattle grazing. male children are encouraged to attend the university. the longest river on the continent is located here. birthdays are celebrated on january 1st. per capita income of northern buckland is more than $100,000.