Answer:
a- reincarnation
Explanation:
Karma relates to reincarnation because the Hindus believe that each person has many lives and what a person does in each life determines what he or she will be in the next life.
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Because there was either less supplies or more supplies where there was trade.
The invention of the telegraph. Hope this helps.
Well some rivers in Europe are used to transport goods. Sometime people even travel on them. River also can provide power.