c.polluting a river because u are contaminating the water
D.the testing of nuclear weapons by north korea. because they have more weapons that could destroy many places
Effect: The war changed economic, political, governmental, and social relations between Britain, France, and Spain; their colonies and colonists; and the American Indians that inhabited the territories they claimed. France and Britain both suffered financially because of the war, with significant long-term consequences.
Causes: In the early 1750s, French expansion into the Ohio River valley repeatedly brought France into armed conflict with the British colonies. In 1756–the first official year of fighting in the Seven Years War–the British suffered a series of defeats against the French and their broad network of Native American alliances.
To cause the reaction, catalysts use the catalytic cycles, decomposition reactions, and combustion cycles.
<h3>What do you mean by a reaction?</h3>
A reaction refers to the chemical process where substances mutually act and are changed into different substances.
Catalytic cycles refer to the multistep reaction that involves the catalysts. It is considered the main method that describes the major role of catalysts.
Decomposition and combustion cycles are also used by the catalysts.
Therefore, A and B are the correct options.
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Answer:
the level of the sea's surface, used in reckoning the height of geographical features such as hills and as a barometric standard
Explanation:
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