Answer:
In the 17th century the greatest threat had come from a land power, France, jealous of Habsburg power in Europe; in the 18th it was to come from a sea power, England, while the Austrian Habsburgs became the main continental enemy of Spain.
Explanation:
In the 17th century the greatest threat had come from a land power, France, jealous of Habsburg power in Europe; in the 18th it was to come from a sea power, England, while the Austrian Habsburgs became the main continental enemy of Spain.