Changes to the constitution are called
a. articles
b. reviews
c. sections
d. amendments

The answer is amendments or letter d.  This is when certain additions, changes, adjustments or removal of a certain feature or content occur in a constitution.  Usually, the process to amend the constitution is written within the constitution itself.  Common ways to amend a constitution could through a special body within the government legislature where it is discussed, debated and voted on.  When the amendments are made, they are presented to the people for approval.  If the amendments are favorable then it is enacted or passed.  If not goes back to the process for further discussion.

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.