I think it is 7 because it explains it
In his "Letter from Birmingham Jail," King argues that "injustice anywhere is a threat to justice everywhere." The evidence he employs is that of racially discriminatory laws in the South. King argues that the existence of unjust laws such as segregation represent an injustice. And this unjustice is an obstacle for achieving equality and justice everywhere in the country. For example, if white people do not believe in segregation, this nonetheless means that they have to abide by the law, causing injustice. The appeal that he uses is logos, as he encourages us to think of the logic of the arguments put forward by lawmakers.
A space or gap that allows other passages or a beginning of an initial part. <span />
Answer: B) GERUND
The answer is gerund.
