The correct answer is a. evolution.
Darwin was the scientist behind the theory of natural selection, one of the main mechanisms behind evolution (next to sexual selection).
Answer:
By the time of the onset of the American Revolution, Britain had attained the status of a military and economic superpower. The thirteen American colonies were one part of a global empire generated by the British in a series of colonial wars beginning in the late seventeenth century and continuing on to the mid eighteenth century
Hitler and his girlfriend were main causes
