The simplest definition of ecosystem is that it is a community or a group of living organisms interacting with each other and with non - living things.
HOPE THIS HELOS AND OLS MARK AS BRAINLIESTAND THNXX :)
#1 would be A, #2 would be false, as narcotics are incredibly addictive. #3 is absolutely true, as abuse of almost any medical thing can be life threatening.
