explique por qué España no podía utilizar el Mar Mediterráneo donde antes estaba la ruta de la seda hasta Asia y qué otra ruta encontró.

This question is an opinionated one, and we don’t know anything about the module or anything, thus we can not answer it. but if you are having trouble on what it is asking basically it is just asking to (using your knowledge on the topic) say which topics you were most interested and which were the most challenging.hope this : p

Basically create a schedule on what you need to study and stick with it