Who or what would be considered a reliable primary source on the subject of directing a hollywood movie?

Ineed to have answers for numbers 2-4 reply to this question

Why did siddhartha gautama leave home at age 30? a. to find answers to his questions about human life b. to establish a religion that was better than hinduism c. to those who felt pain and suffering in life d. to spread his new religious ideas to other people

What does the term “escalation” refer to?