What drove away the swomee-swans

Smog, I think

Explanation:

Later, smog comes out of the Once-ler's factory's chimney, which, according to the Lorax, got into their throats and made them lose their ability to sing, so they flew away.

i don't know the answer to this

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.