What feature of the ancient Athenian and Roman governments evolved into a key feature of modern Western governments?

Democracy.

Explanation:

Democracy is one of the greatest characteristics found in the ancient Athenian and Roman governments and it has evolved to be the main element of governments in modern western countries.

The Romans and the Athenians saw democracy as a way of providing freedom and happiness to the population, in addition to promoting the suppression of abuses of authority and concentration of power in a ruler who could not be removed from his governmental position. For these peoples, democracy also allowed the people to have a direct representation in government guidelines, promoting social, economic and political well-being.

the use of electrical signals that transit messages is know as

answer; code of federal regulations;