Answer:
let us not wallow in the valley of despair.
It is this line: "<span>Fellow-citizens, above your national, tumultuous joy, I hear the mournful wail of millions! whose chains, heavy and grievous yesterday, are, to-day, rendered more intolerable by the jubilee shouts that reach them."
Douglass admits that the Independence Day is an important date when a great thing happened for all Americans. But he thinks it is inappropriate to celebrate a nationwide holiday when there are millions of members of this nation who are not free and able to celebrate. This festivity makes those people feel even worse.</span>
The author used DETAILED DESCRIPTION to create compelling characters in the passage given above.
From the passage given above, it can be seen that the author took his time to describe the characters and the settings in details. This gives the readers the opportunity to mentally picture the characters and the settings in the story.
