A firsthand account of an event is told by-- someone who did not see the event
someone who has a strong opinion about the event
someone who saw the event happen
someone who does not have all of the knowledge about an event

I'd say the answer is someone who saw the event happened.

Explanation:

I don't know too much about arts but I'd say firsthand would be someone who saw it, the other answer choices do not make sense either. Sorry if this answer and/or explanation did not help.

Someone who saw an event happen

Explanation:

Firsthand knowledge of an event is knowledge based on direct experience or observation.

b energy transmission, d energy distribution, and e energy education

        i think it is referred as the 8th wonder of the world because each of the terra cotta warriors was not the same. they each had many things with their physical stature, like different height, armor, and different characteristics, which were all different. what makes it interesting is that there were 8,000 soldiers in that tomb. so making that many soldiers for the emperor meant a-lot to the emperor. it means that their is strength in numbers now matter how different.

hope it : p