cuál es l importancia de mantener activ la memoria social y colectiva de los acontecimientos que han marcado la historia​

Question: What is the importance of keeping active the social and collective memory of the events that have marked history?

Explanation:

English: Collective memory refers to how groups remember their past. The Chinese remember the century of humiliation, while Americans remember 9/11 and subsequent events, and the people of many nations remember the era of World War II. Collective memories may occur at more local levels, too.

Spanish: La memoria colectiva se refiere a cómo los grupos recuerdan su pasado. Los chinos recuerdan el siglo de la humillación, mientras que los estadounidenses recuerdan el 11 de septiembre y los eventos posteriores, y la gente de muchas naciones recuerda la era de la Segunda Guerra Mundial. Los recuerdos colectivos también pueden ocurrir a niveles más locales.

why was the national assembly formed by the third estate?

the estates-general had not been assembled since 1614, and its deputies drew up long lists of grievances and called for sweeping political and social reforms. the third estate, which had the most representatives, declared itself the national assembly and took an oath to force a new constitution on the king.

letter d is correct.