Giacomo uses cocaine. he finds that he needs a line or two to re-create the original effects of a "bump." which is the most specific term describing giacomo's experience?

I believe the answer is: physiological dependence

physiological dependence refers to the situation when our body starts to lose its proper function unless there is one unique substance exist in our body.
This dependence usually achieved after a prolonged use of an addictive substance such as narcotics, caffeine, or nicotine.