Answer:
Nation is considered as the permanent community of individual which is associated through common language, history, ethics, values,customs,history etc.
State is defined as a territory with its own government and borders within a larger country.
Nation-state a form of political organization under which a relatively homogeneous people inhabits a sovereign state especially : a state containing one as opposed to several nationalities.
Non-state actors is generally understood as including any entity that is not actually a state, often used to refer to armed groups, terrorists, civil society, religious groups, or corporations; the concept is occasionally used to encompass inter- governmental organizations.
