They helped clear the respiratory system I think but I'm not entirely sure
Answer: B to secure natural resources such as oil
Explanation:Ed
<span>constitutional democracy
The American colonists created a constitutional democracy when they formed the United States of America. A constitutional democracy is a system of government in which power is defined, limited, and administered by a body of laws known as "the Constitution."</span>
Hunter-gatherers were the men and women during the Mesolithic era and some of the Palaeolithic era. Hunter defines the men who hunted for meat and gatherers define the women who gathered/collected berries and fruits.
I hope this helps! -Wajiha
