The source of international law is usually not the united nations, but rather individual nation's laws. true

That is "False".

International law is the arrangement of guidelines for the most part viewed and acknowledged as authoritative in relations among states and between countries. It fills in as a structure for the practice of steady and composed international relations. International law varies from state-based lawful frameworks in that it is basically applicable to nations as opposed to private subjects.

the use of electrical signals that transit messages is know as

answer; ///biological psychologists;