What is one roadblock to good discipline and why?

One roadblock to good discipline is confusing discipline and punishment. discipline teaches the child right from wrong, while keeping their state of self-esteem and self-control. punishment temporarily restricts the child from doing a hobby (example: getting your phone taken away), but it doesn't properly teach the child what is right and what is wrong. think of it this way: discipline helps the child to learn what they did wrong, but the parent and/or guardian usually shows the right way to do it. punishment makes the child suffer for doing something wrong, but is never taught the right way. 

i hope this helps! :)

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.