Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Let me give you an example: Paragraph- Sent 1: Obama was born on August 4, 1961, at Kapiʻolani Maternity & Gynecological Hospital in Honolulu, Hawaii.
Sent 2: He is the only President to have been born in Hawaii.
Sent 3: He was born to a white mother and a black father.
Sent 4: His mother, Ann Dunham (1942-1995), was born in Wichita, Kansas, of mostly English descent, with some German, Irish, Scottish, Swiss, and Welsh ancestry. Question: How old was Obama's mother when he was born?
The answer to this example can be: 19.
Here is why: Obama was born in 1961. His mother was born in 1942 and 1961-1942=19. Therefore, any of the following responses are considred correct: '19' and 'almost twenty'.

OK. solve this:
Paragraph- Sent 1: The cute red ball rolled over to the blue ball and said hello.
Sent 2: The blue ball was scared and went to cry to the green ball.
Sent 3: The green ball laughed at the blue ball.
Sent 4: Then the green ball told the orange ball that blue ball was stupid.
Sent 5: Most felt this was not good to do and so they punished the green ball by taking away all his air.
Sent 6: From that day on everyone saw the air-less green ball and knew that they could not do or say any bad things.
Sent 7: This is how the trouble started.
Sent 8: The purple ball used the fear of everyone to become the leader that they all feared.
Sent 9: The purple ball was mean to everyone.
Sent 10: Until one day the red ball spoke up and got all the other colored balls together and they took the air from the purple ball and put it in the green ball.
Sent 11: Sadly, the green ball had been without air for too long and was dead. 
Question: Why did the green ball laugh at the blue ball?.
Answer:
Because the blue ball was afraid of the red ball.