How is the second crusade different from the first?

Eugene did not control Rome and lived instead at Viterbo, but nevertheless the Second Crusade was meant to be more organized and centrally controlled than the First: the armies would be led by the strongest kings of Europe and a route would be planned beforehand.

Explanation:

The Second Crusade (1147-1149 CE) was a military campaign organised by the Pope and European nobles to recapture the city of Edessa in Mesopotamia which had fallen in 1144 CE to the Muslim Seljuk Turks.

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.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.