Question

which endocrine gland is indicated by the arrow?
pineal gland
adrenal gland
hypothalamus
ovary

Explanation:

The adrenal glands are located on top of the kidneys. The pineal gland is in the brain, the hypothalamus is also in the brain (near the pituitary gland), and the ovary is part of the female reproductive system (not near the kidneys). Based on the anatomical position shown (on top of the kidney - like structure in the diagram), we can identify the gland.

Answer:

adrenal gland