"windmills had to be built to face the wind." what does the word "face" mean in the sentence.

a. a funny or odd look
b. the front of a person's head
c. the surface of something like a clock
d. turned so that the front of some thing or some body is pointed one way

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.