Revolutions in other countries and a 20 year war
The British defeat at the Battle of Saratoga showed them that it could be won. Anything that weakened the English gave new hope to the French that the UK could be defeated in Europe.
no
In England the agricultural revolution led to massive changes in the organisation and mechanisation of farming. The American revolution had significant consequences for the British Empire and encouraged the French people to believe that tyranny could be challenged. The French Revolution resulted in the abolition of the monarchy and the feudal system in France.
The drought could have contributed to the French Revolution. The crop failure coupled with the cold weather caused the peasants to uprise.
Other rulers may be concerned that the citizens of their nation, seeing the success of the French Revolution (and the American Revolution before it), could revolt against their government. The leaders wanted absolute power, and the ability of a nation to rise up against their government made rulers worrisome for their own countries.
that they had a revolution sometime in history
No they did not. The French Zouaves were first created as a unit in Algeria in 1831. Since the French Revolution ended with Napoleon's coup in 1899 such an engagement could not have been fought.
writing a constitution
The Americans never "supported" the French Revolution. They understood very well why the French wanted to have a change in their own country. Because the French had helped America fight in their revolution, America was freed from the UK government and got their declaration of Independence. When the French troops returned home and started revolting against their own government as well, the Americans understood very well the cause of it and at first supported it, but only until it became clear to the Americans that the French were using horrible violence and were actually planning on dethrowning and killing the King and Queen. When the Americans got wind of that, they stopped their understanding instantly since they could not agree with such radical and violent plans. Especially not, since King Louis XVI had sent the French troops to America to help fight against the UK! How could they support a country that wanted to rid itself from the French King who gave the Americans the ability to be independent? They were very grateful to Louis XVI and they started to sympathize with him.
That they could create a better French society and government than existed under the Monarchy.
The initial stirs of french revolution could not take off because the leaders had approval seeking tendecies, when they tried to appease all of them, they ended getting nothing.
I'm assuming you mean how all three are different. The America revolution was to break away from the Mother Country. The French revolution was to force the monarchy out of power so they could have a democratic government. The Glorious Revolution was to keep Catholics off throne of Protestant England because a Catholic heading the Anglican church just wouldn't work.