All of the following were parts of structure of the articles of confederation EXCEPT a-unicameral legislative body
b- equal representation
c- one vote per individual state
d- an executive branch

d- an executive branch

Explanation:

The Articles of Confederation was the first attempt by the now independent colonies to establish a national government for the United States of America.

The states however wanted to keep as much of their independence as possible and so gave little concession to the national government such that the articles did not even have an executive branch as the states did not want to give too much power to what they considered to be too few people.  

dirty, contaminated water

contaminated food,

chlostrophobic living spaces,

mice infestation,

etc,

it's not the readmission