If one royal persons officially makes all the decisions in a nation, that government is called a(n)

A Monarchy or a Dictatorship.

Explanation:

A Monarch(Depending on the type of Monarchy) may make the rules, however, the people make question it civilly, and in certain cases it make have to be passed through said nations legislative branch. However, with a Dictatorship, anything the ruler says goes. No one gets a say in otherwise, or they in most cases will be silenced quickly and forcefully. However, to answer your question, it's most likely a Monarchy, due to the questions basis.

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .