What is the duct that connects the kidney to the bladder?
a. urethra
b. ureter
c. trachea
d. colon

Answer the lack of variation in activity can lead to boredom and eventually cause exercise to stop;

Your answer is .edu .org .gov these indicate that the website is official and not open for anyone else editing, its all reviewed or verified information.

I'd say replacing that habit (of smoking) with a more healthy habit, like going to the gym. c;