What is the main difference between an oligarchy and a monarchy?
An oligarchy shares power with an elected body, but a monarchy rules alone.
An oligarchy is ruled by several people, but a monarchy is ruled by one person
The citizens of an oligarchy have the ultimate authority over the government, but the king or queen has ultimate authority in a
monarchy
The citizens of an oligarchy vote for the government leaders, but leadership in a monarchy is inherited.

Explanation:

Monarchies are families that inherits its power while the second is called a oligarchy which is from dictators who pass over leadership which is not inheriting.

The citizens of an oligarchy vote for the government leaders, but leadership in a monarchy is inherited.

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the lines on a surface map are called isobars. isobars are lines of constant pressure which are measured in units called millibars. the numbers indicate the amount of air pressure, in millibars, that each line represents.