The forebrain is the anterior part of the brain and consists of cerebrum, thalamus, and hypothalamus. The cerebellum, located in the posterior part of the brain, is not a part of the forebrain. The cerebrum is responsible for conscious thought, voluntary actions, and processing of sensory information. The thalamus is a relay center for sensory information, and the hypothalamus controls the endocrine system and regulates various physiological processes like temperature, hunger, and thirst.