Giving brain liest for whoever does this!! only have to answer number oone lol

i dont rlly know much but here:

Explanation:

I used to think that kingdom of kush was a strong ancient kingdom and had a new big achievement almost every day. But now I think that since the kingdom fell it wasn't as strong as I imagined but, it is and as it should be, a big rememberance in history.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

your answer would b. the missisipi river

hope i you : )