Which part of the brain controls body temperature and the urge for eating?

$A$ man is admitted to a hospital. He is suffering from an abnormally low body temperature,loss of appetite,and extreme thirst. His brain scan would probably show a tumor in

Which part of the human brain is concerned with the regulation of body temperature?

Neurohormones are secreted by

The pituitary gland is under the control of which gland?

What is the location of the hypothalamus in the $diencephalon$?