3 is the answer. This harms the lungs. Nicotine can cause lung damage less fast than tobacco.
Answer:
The most common reasons adults don't adopt more
physically active lifestyles are cited as:
insufficient time to exercise.
inconvenience of exercise.
lack of self-motivation.
non-enjoyment of exercise.
boredom with exercise.
lack of confidence in their ability to be physically
active (low self-efficacy)
Explanation:
keep smiling
They are all known as a skill related factor.
