I believe the answer is: <span>physiological dependence
</span><span>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.
</span>This dependence usually achieved after a prolonged use of an addictive substance such as narcotics, caffeine, or nicotine.
There are two types of rainforests, tropical and temperate. Tropical rainforests are found closer to the equator where it is warm. Temperate rainforests are found near the cooler coastal areas further north or south of the equator. The tropical rainforest is a hot, moist biome where it rains all year long.
You need a variable. If something happens once it could just be chance. Like if you got a lottery ticket and won, it would just be chance. Not the thing that happens the most.
