<span>A is the correct answer. The London Fog of 1952, also known as the Big Smoke, affected London for four days in December 1952. The pollution in the air was caused by burning coal and a lack of wind caused smog in the city. 4000 people died and 100,000 were injured.</span>
Probably a or c idk but provably c
"b. They keep herds of animals" and "<span>c. Their food supply is more reliable than that of farmers" would be be accurate descriptions, since hunter-gatherers need to move around because they have not domesticated plants or animals. </span>
