Trade spread the italian renaissance across europe by

Helping merchants become patrons.

Explanation:

One of the ways in which trade benefitted the Renaissance was by creating a class of wealthy merchants. These merchants suddenly became very successful, and this enabled them to spend their money in financing the work of artists. These people were called patrons, and they played a very important role in allowing artists to invest the necessary time and effort into developing the art that we now identify with the Renaissance all over Europe.

don't know but i know the moderators know how to. : (