How did European labor systems before 1450 differed from the Chinese labor system depicted in the two images

just finished this it is b. centrifugal force

martin luther king (1929-1968) was an activist for the african american rights, mr. king has a profile of a kind leader that built a tenacity, respect and full of hope future. he was an activist through civil disobedience and no violence pressure mechanisms. he tried to build a more egalitarian and fair society. his efforts carried a reivindication message of the civilian rights to every west corners. for that reason, he won the nobel prize in 1964.

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."