Why did the europeans want an all water route to asia

Europeans wanted to have access to certain items, mostly tea and spices. They had access to these goods already, but they arrived through land, and on the way they were taxed, and were therefore expensive. Europeans were hoping that trading with the Indians directly would be cheaper. 

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