Perception,Brand,Dissonance,Belief and Attitude

What is perception?
What is belief and Attitude?
What is brand?
What is dissonance?

Perception is the process of obtaining awareness or understanding of environment through the interpretation of sensory information gathered from sense of sight, smell etc.
Attitude is feeling or disposition or inclination of both heart and mind.
Belief is a state of heart and mind in which a person some proposition to be true.
Brand is a collection of terms which represent a design, logo, sign, symbol that differentiates one seller’s goods and services from other. E.g.
Dissonance is a state of unrest.