Scientists who argue that modern humans evolved from a single population believe that humans came from the continent of
a. africa.
b. europe.
c. south america.
d. asia.

Scientists generally agree that the origin of modern humans was in Africa - specifically in East Africa. From there they travelled to Europe and Asia via what is today Palestine and Israel. From Asia they reached Australia and North America and from the North America they reached South America - so the correct answer is a)

The answer would be newton’s second law