The cerebral cortex, the largest part of the brain, is the wrinkly gray outer covering of the cerebrum.
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B.) A dog walks to a stream and drinks when it gets thirsty
would have to be your answer..
This can be identified as a population. In a population, the organisms are the same species and they have to live in the same area. For example, the population of cities are the head count of the species of human in that one area.
