Where do cultures typically begin?

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

C. naturally in the environment

Tropical climate is experienced in the nothern countries of south america

There is a great difference between the windward and leeward side of a mountain. windward and leeward sides are opposites.