How do context, audience, and purpose influence the decisions we make as writers?

What is the roosevelt’s main purpose in this speech

What are your educational and professional goals and how will this program you achieve your goals?

Have you ever contributed to “social media outrage” (using your social media accounts to boost the anger about a contemporary issue by forwarding it, liking it, etc.) without stopping to think who might’ve originated the message or what the originator’s motives might’ve been? provide example.