Thyroid Gland and Metabolism Regulation

The endocrine system plays a crucial role in regulating various bodily functions through the secretion of hormones. Some of these hormones influence growth, metabolism, and mood. Understanding the major glands of the endocrine system helps in navigating how these hormones impact behavior and physiological responses.

Which of the following glands is primarily responsible for the regulation of metabolism and energy levels through the secretion of hormones such as thyroxine?