Answer:
A social effect of an event in history would be the change in social norms of that time. For example, this would be when Christianity got accepted in the Roman Empire.
A political effect of an event is when there is a big change in leadership that changes an important country forever. Important in that time period of course. Like when the Russian Empire became the USSR in a political shift.
The economic effect of an event would be when a big change in world economics occurs. Like when the Great Depression struck the world economy.
