Why did European monarchs declare war on France during the French Revolution?

to protect the endangered aristocracy

to end the persecution of the former monarch

to stop the new ideals of freedom and equality

to gain control and influence over another area

to end the persecution of the former monarch. - second choice

to protect the endangered aristocracy

Explanation:

French revolution created an atmosphere of anxiety among the other European nations. they were left with two options either to took advantage of the disturbance in France or to nobility of France. They soon realized that the revolution can affect their states and they rush to protect the hierarchy, prevalent in Europe.