The right answer for the question that is being asked and shown above is that: "thermonuclear." The <span>idea that does Sagan stress through the use of parallelism is the word thermonuclear.</span>
Answer:

Douglass advocated equal justice and rights, as well as citizenship, for blacks. He begins his speech by modestly apologizing for being nervous in front of the crowd and recognizes that he has come a long way since his escape from slavery.
Answer:
what do u need help with?
Explanation:
Examples of physical changes are boiling, melting, freezing, and shredding. Many physical changes are reversible, if sufficient energy is supplied. The only way to reverse a chemical change is via another chemical reaction.
Answer:
It would be best to include, "cause and effect", "problem and solution", and "comparison and contrast".