Why are rainstorms stronger?

As we increase water vapour in the atmosphere, we can increase the amount of rainfall in these extreme precipitation events.” ... And climate change can amplify these effects, causing updrafts to grow stronger and wider, which pulls in more warm air from surrounding regions and leads to more rain.

Explanation:

economic

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.