Many religious faiths held these to get people more involved in religion
a. revivals
b. town hall meetings
c. unions
d. factories

The correct answer is A- revivals.

Explanation: Church revivals are meetings usually held on consecutive nights to try and bring new people or converts to the church sponsoring the revival. The most notable revivals in modern times were held by Billy Graham, who held revivals at Madison Square Garden in New York from May 15, 1957 until September 1, 1957 and had over 2,000,000 people come to hear him preach.

the event is known to be the soviet union.

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."