After the revolution, the practice of enslaving African Americans was illegal.
City planners do all of the above mentioned statements. Urban planners<span> develop plans and programs for the use of land for towns, </span>cities<span>, counties and regions, while taking into account environmental, zoning and legal issues. They often present reports to government officials and the public about land-use projects. They also know how to build cities from scratch.</span>
The continent is Antarctica.