What was the major part of 9/11

the twin towers being struck down by terrorists

When the plane hit the Tower and one fell on top of the other.

Explanation:

Hope this helps UwU

And heyo

answer; ///i believe that the correct answer is (a) the great depression

1) the andrew carniage's purchase and renovation of skibo castle have been very good and auspicious for the local people of dornoch firth, scotland because this is a turistic attraction for many people who would want to know the castle, the local people would take advantage about this.

2) yes, it could.