The key point made in a passage is called its idea.

The key point made in a passage is called its main idea.

Explanation:

The main idea -or central idea- of a passage is the most important thought of a paragraph or larger section of a text. Although it may not be clearly stated, main ideas tell the reader what this paragraph or section is about. It is usually a sentence that can be located at the beginning of the paragraph or in any other place within the paragraph.

through negative experiences we learn many things its sort of like karma if u do something bad to someone and u get a consequence u dont like the next time u wont do it again and as for positive ur not really learning anything and another example for negativity people didnt want barrack obama as president because they thought he was the worst and he was taking but now we have donald trump   and hes   is not anyone and shut down the government over sum petty stuff unlike barrack obama who shut down the government because they did not want to give health care to the community and now these people who want him out want him in now

it can be many reasons such as they could want they're family to live and explore more two. might just want to be nice.

3.some say for the greater good or future.

4. they might want to have they're baby,kid,family explore more. people just sacrifice.

true fact:

someone is sacrificed everyday.