Last question!

which two systems do not share power between the central and local governments?

Unitary and Confederation

Explanation:

A Unitary system is defined as: "A system of political organization with a central supreme government which holds the authority over and makes the decisions for subordinate local governments"

A Confederation system is defined as: "A group of nations or states, or a government encompassing several states or political divisions, in which the component states retain considerable independence"

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances