Nigeria’s economy is almost entirely dependent upon 1. energy production
2. Agriculture
3. Service industries
4. Manufacturing

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.

answer; the above statement is (false);

answer; /// the need to make choices because economic wants exceed economic means;

answer; nearly half;