Write a short note on:

(a) Zollverein

(b) Treaty of Vienna

zollverein is a union of German states for the maintenance of a uniform tariff on imports from other countries, and of free trading among themselves. any similar union or arrangement between a number of states; customs union.

Explanation:

ldk (b) one

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.