Which system has a central government and local units that implement the central government's decisions?

Unitary system

Explanation:

There are three types of government systems :

Unitary System, Federal system, Confederate system

Among the three, the Unitary system is the one where the Central government has the complete power. The local units might not even exist in such a system and even if they do, their only power or job is to implement the decisions that have been taken by the Central Government. Countries like China, United kingdom and France run the governments on Unitary symmetry.

answer; with few regulations protected the prices of crops which made farmers leave their farms and migrate to the big cities to work in factories;