Which statement is a simple definition of motivation

A)  Motivation is a precursor to dominance. 
B)  Motivation involves goal-directed behaviour. 
C)  Motivation includes all voluntary behaviour. 
D)  Motivation requires intentional behaviour.

Motivation involves setting a goal and then working towards achieving it. It is the driving force behind an individual's behavior that leads to goal-directed behavior. Option A is incorrect because dominance and motivation are not related concepts. Option C is incorrect because involuntary behavior is also a part of motivation, such as a reflex response. Option D is incorrect because motivation can also result in unintentional behavior.