What does the idiom, he is a couch potato mean?

This idiom means, someone who spends little or no time exercising and a great deal of time watching television.

Explanation:

This idiom is supposed to have originated in the 1970's in America by a comic artist who drew two idle and inactive characters, who he called "Couch Potatoes."

- "the answers are a and b.  

when cullen speaks of planting while others reap, and standing "abject and mute," he is speaking about the racial injustices present in american society. as these injustices have changed over time, the american identity  has also shifted. those changes are, in turn, reflected in american literature."