What metaphor does king use to close the letter and why is it appropriate?

The metaphor that King gives in this example is that of "horse and buggy pace," which refers to transportation before automobiles. The metaphor serves two purposes. First, it emphasizes how slow the advancement of civil rights has been for African Americans by presenting an image that any modern reader would associate with a slow pace.

Secondly, the metaphor also provides an image of the past. This is to highlight how civil rights advancement is being conducted in a way that does not resemble the modern era, but that is instead reminiscent of a time with less social progress.

should congress have the power to interpret the constitution? write a paragraph in which you argue for or against the wide application of the limplied power

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.