Cual es el principio básico de sigmund Freud en su teoría

good question. i'll be looking into that. (this is a joke sir)

the use of electrical signals that transit messages is know as

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

answer; obscene;