Answer:
Transportation of materials, risk of natural disaster impacts, convincing people to move, drastic changes in the air at high altitudes for potential new residents, materials erode more quickly at higher elevation
Just ideas though.
Explanation:
Scientists have hundreds of potential definitions for life and their definitions often vary by the field of science that they are in.
Many scientists do agree on a basic definition of “life” as being able to reproduce, grow, and have continual change. Scientists are not exactly sure how life “begins”, but it is asserted that scientists will be most likely to find life, if life is dependent upon a water supply to thrive, in zones where liquid water or water vapor can exist on its surface. If there is the ability for life to thrive on other entities besides planet Earth using gases, where humans cannot survive, it will be harder to find these instances of life.
The Romans were very xenophobic towards the Syrians in their cities.
Many presidents were elected to more than one term, among them George Washington, Franklin D. Roosevelt, Thomas Jefferson, James Madison, James Monroe, Andrew Jackson, Ulysses S. Grant, Grover Cleveland, Woodrow Wilson, Dwight D. Eisenhower, Ronald Reagan, Bill Clinton, George Washington, Harry Truman, George W. Bush, Theodore Roosevelt, Calvin Coolidge, Richard M. Nixon, Lyndon B. Johnson, William McKinley, Abraham Lincoln, Barack Obama