Final answer:
The crusades led to growth in trading, interest in learning, and cultural diffusion, but not to weakening power of monarchs.
Step-by-step explanation:
The crusades had several significant effects, but weakening power of monarchs was NOT one of them. The crusades were a series of religious wars fought by Christians in the Middle Ages, primarily against Muslims in an attempt to regain control of the Holy Land. As a result of the crusades, there was a growth in trading, as Europeans sought new trade routes to the East. Furthermore, the interest in learning and the growth of universities were also stimulated by the crusades, as scholars from different cultures came into contact and exchanged ideas.
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