Why were freedom of speech and freedom of the press important to the abolitionist movement?

Which statement describes a similarity between the great migration and to this day

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

When there are advances in technology, such as the personal computer, how might business productivity change? a) productivity is separate from technological advances so there is no impact. the new technology can replace outdated, less efficient, machinery. o) the businesses' products will no longer be demanded. d) manufactured items will be made elsewhere.