There were frequently change of constitution in nepal mention any four reasons with their solution

Nepal has undergone and is consistently undergoing changes in its governance, and structure of society for which it has lead to frequent changes in the constitution.  

Explanation:

The Government of Nepal act 1948, was changed because there were no democratic rights in the Constitution.

The first democratic constitution enacted in the year 1959 was scrapped by the King of Nepal because he felt that the constitution is trying to reduce his powers.

The next constitution enacted in 1962 was scrapped after a short period of time because it was an anti democratic constitution.

In the year 1990 the King of Nepal used the constitution for selfish needs.

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.