What's the definition of westerlies

The rulers of the west african kingdoms expanded their lands by

Pls thomas jefferson believed that the french revolution and the reign of terror, a. should be exported to the rest of europe. b. would bring the united states and britain closer together. c. we’re understandable yet regrettable responses to the excesses of french monarchy. d. we’re not particularly important developments.

What did the introduction of silk into the mediterranean do for the abbasid empire