Host is a. to receive or entertain guests at or for
b. a living animal or plant on or in which a parasite lives
c. a person who talks to guests on a radio or television program
d. a great number

A

Explanation:

to recieve or entertain guests at or for

in "letter from a birmingham jail," king argues that there are four basic steps in any nonviolent campaign: "[c]ollection of the facts to determine whether injustices exist; negotiation; self purification; and direct action." finally, direct action is taken and acts such as boycotts and sit-ins are staged.

- "when these words are put together to convey a meaning it is known as a sentence. a sentence is a group of words that makes complete sense. placing of words in a sentence is very important. the second sentence is a question."