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.
the marginal social benefit of producing and consuming another unit equals the marginal social cost.
When varying greatly in size as a result of flooding or evaporation, this means that it has to be a body of water. The only body of water provided (Whose location is correct) is Great Salt Lake, Utah.
The correct answer is remote grandparents.
Remote grandparents refer to grandparents who only occasionally spend time with or interact with their grandchildren due to physical and/ or emotional separation. Grandparents might be physically and/ or emotionally separated from their grandchildren due to reasons such as living far away from each other or due to a divorce of the children's parents. Since Luisa and Mark only see and spend time with their grandchildren during holidays, they can be considered remote grandparents.
The answer is Mansa Musa.
Hope this is helpful. :)