Answer:
the "bad guy" or villan in storys. This charecter is generally the one who causes conflict and is vital to most storys.
I believe the answer would be C, burning fossil fuels. Oil and gas is made up of the remains of microscopic plankton. Over millions of years the remains become the carbon-rich coal, oil and gas we can use as fuel. When fossil fuels are burned they release carbon dioxide into the atmosphere, thus contributes to global warming.
After Latin American nations won independence, US president James Monroe issued a warning to European countries that they may attempt to take back the colonies that they had once owned.