The Hypothalamus is the brains structure that provides a major link between the nervous system and the endocrine system.
Hypothalamus is a small part that is located on the under-surface of the brain.
The main role of the Hypothalamus is control and regulation of human's hormone system.
Hence, the Hypothalamus is the brains structure that provides a major link between the nervous system and the endocrine system.
Therefore, the Option D is correct.
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