A word that describes medication, vitamins pesticides and household cleaners is obviously CHEMICALS. Chemicals are developed to bring utility and somehow comfort to what we do and what we need to do. Drugs and fresheners are chemicals. This is the best answer i could give you hope this helps.
Answer: Never swim alone
Explanation: You have to at least have one person with you, you cannot swim be your self just in case something happened to you nobody would be there to help.
I would say for because everything else is important <span />