Cerebral cortex is called the seat of consciousness. why?
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The cerebral cortex, i.e. the external part of the brain with its grooves and folds, plays a major role in our consciousness. ... Therefore, this region of the brain appears to play a role in deciding which impressions reach our consciousness. Thus the content of consciousness is based in two different brain regions.

Explanation:

The cerebral cortex, i.e. the external part of the brain with its grooves and folds, plays a major role in our consciousness. ... Therefore, this region of the brain appears to play a role in deciding which impressions reach our consciousness. Thus the content of consciousness is based in two different brain regions.

Cognitive functions are heavily dependent on our cerebral cortex, which is composed of a number of grooved and folded areas of the brain. Accordingly, this part of the brain may be involved in the selection of impressions that reach our consciousness. Consciousness is therefore reliant on two separate brain regions.

Explanation:

b is the best answer for this question.

b. the carbon cycle ensures living things have a source of hydrogen