What were 3 chief features of the Spanish empire in America?

The three chif features are:

- The spanish empire was regarded as the most populous nation in the new world with the richest natural resources reserve

- The Government was somehow influenced by the Catholic Churches, and they called their civilizations an "empire of towns"

- The spanish was the first nation to introduce slavery in American continent and they also introduce the use of silver and gold as a medium of trade to China and Philippines 

this doesn't support enough information to answer the question.

the following men who did not in the unification of italy were.

a) giuseppe mazzini

c) alexander ll

the other two men were camilo cavour and giuseppe garibaldi they the unification of italy by yielding territories in the italian unification. in 1861 italy was declared a united-nation state under the sardinian king victor immanuel ll.