Step 1: Understanding the Concept:
The question asks to identify the endocrine gland that is situated on top of the kidneys.
Step 2: Detailed Explanation:
Let's review the locations of the glands listed:
(C) Adrenal gland: There are two adrenal glands, and each one is located on top of a kidney. The name itself gives a clue: `ad-` (meaning near) and `renal` (meaning related to the kidney). These glands produce hormones like adrenaline and cortisol.
(A) Pituitary gland: Located at the base of the brain.
(B) Thyroid gland: Located in the front of the neck.
(D) Pancreas: Located in the abdomen, behind the stomach.
Step 3: Final Answer:
The adrenal gland is the endocrine gland located above the kidney.