Answer :

Human beings are intelligent and different from other animals due to the following reasons:

I. Size of the brain: in enlarged brain in neuron connections more which increases IQ. Whereas, the number of brain cells actually remains constant in other animals.

II. Development of large number of folds: a greater number of folds in the cerebral cortex is a significant step in human brain evolution, it increases intelligence.

III. Division of cerebrum: Another unique feature of the human brain division of the cerebrum into 2 halves. The left side of our brain controls the right side of our body and right side of our brain controls left side of the body.

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