What is the main cause of desertification worldwide? Use of chemical fertilizers
Overgrazing of livestock
Lack of irrigation
Monocrop agriculture
Planting of non-native crops

The answer should be a.

France played a key role in the american revolutionary war (american war of independence; 1775–1783). motivated by the ideals of the new nation which were inspired by the french enlightenment, as well as its long-term rivalry with britain and so as to avenge their territorial losses during the french and indian war, france secretly began sending supplies to the americans in 1775.