How did Henry IV of France try to protect his rule?

He brought the famous Edict of Nantes, which brought religious tolerance in the country. By doing that he ended a long period of religious wars that were spreading across the whole Western Europe. Besides that he changed his religion from Protestantism to Catholicism.

Explanation:

Henry IV was actually raised as a Protestant, so like a king of France, which was a Catholic country wanted to ensure religious tolerance in the country. He was the first ruler from the Bourbon dynasty. Additionally, during his reign France started creating colonies across the globe.

the answer is a new goverment.

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers