Gandhi was a revolutionator, he believed that the suffer he got will bring freedom to people of india because he was always in one principal. He said that he would rather die a dog's death and has his bone licked by dog than he returned home as a broken man.
The correct answer is the main idea
Tone can be best described as as yelling, screaming, or any kind of noise.
For instence, if I were yelling while watching the Super Bowl, that would be a tone.
Hope my example and answer helps!