Why do you think much of the music from the
1960s and 1970s remains so popular today?

Old people

Explanation:

One reason why music from the 1960s and 1970s is still popular is because there are still a lot of people still alive from that time. Since they are still alive they most likely shared their taste in the music with the younger generation (like their children or grandchildren). Because of that the popularity of 60s and 70s music still goes on to this day.

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explanation:

the president, prime minister, chief justice, speakers and ministers take their oath of office. the oath is taken in bengali