Answer:
Freedom of Assembly
Step-by-step explanation:
Freedom of Assembly often referred to as Freedom of Peaceful Assembly, is the United States Constitutional Provision which gives individual the right to gather and in a group voiced their opinions, promote, pursue, and defend their mutual or joint ideas.
In other words, Freedom of assembly is defined as a form of framework of the individuals right to protest. It is included in First Amendment to the Constitution of the United States.
Hence, Freedom of Assembly is the Constitutional provision that allows protestors to gather on the National Mall to protest lack of civil rights