It helps to avoid various legal limitations.
The answer is d. The population of light-colored moths decreased and the population of dark-colored moths increased.
<span>Peppered moth color variation is a good example of natural selection. During the Industrial revolution, due to pollution, trees become darker in the urban area. Light-colored moths were, thus, easy prey. The dark-colored moths were able to camouflage on dark trees and avoid predators. The phenomenon is known as industrial melanism. So, in polluted urban areas, the number of dark-colored peppered moths increased. In the clean environment, were much effective in hiding from predators and they outnumbered the dark-colored moths.</span>
The policies of containment used during the Cold War (which were the Truman Doctrine and the Eisenhower Doctrine) both used the economy to help out other countries to stop the spread of communism. The Eisenhower Doctrine in addition used military forces.
The Bush Doctrine is different because it actually tried to implement democracy into other countries (such as the middle east) in an attempt to stabilize the government.
Spain, England, France and Portugal became dominant int he revolution and began to colonize the New World.
