The heart, liver, and stomach are each examples of
a. a tissue.
b. an organ system.
c. an organ.
d. a nerve

Iwould say being around others who are not drug free is the wrong step because your peers are likely to influence any new or past habits

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.