Purpose: To warn smokers about the dangers of smoking and prevent people from smoking.
Audience: Smokers, general public.
Context: A person is smoking. The smoke from his cigarette forms a gun pointed at his head.
Effectiveness in achieving intended purpose: The image ties with the text as it depicts a man smoking, and the smoke from the cigarette forming a gun, implying that he is endangering himself. The choice of words are effective as they are short and still manage to convey a message across, which is that smoking could endanger your life.