In a society that had made political participation a core element of freedom, became central to the former slaves' desire for empowerment and equality.

The correct answer is : the right of vote

Explanation:

Voting is a way in which a citizen can influence governmental decision-making.  It is an expression of your preferences and thoughts represented in a candidate. It is a right to take part in the government directly or through freely chosen representatives.

we need the diagram to answer this correctly.

the above statement/question is (true);