On the other hand behavior is the outcome of mental processes which is visible and measurable.
Psychology is interested in both behavior and mental activities since both are related each other. As mentioned earlier behavior cannot exist in the absence of mental processes and both occurs knowingly and unknowingly.
Mental processes can happen both consciously and unconsciously. Same way behaviors also can be deliberate and accidental. For example, most of the mental processes of a psychologically disordered person happen unconsciously. Same way behaviors of such persons are also