Answer:
D i think would be the best answer my studie in this part of health is low
The pituitary gland is often called the "main gland" of the body, as it regulates many of the activities of the endocrine glands. ... HET (thyroid stimulating hormone) stimulates the thyroid gland to release T3 and T4 to stimulate metabolism in other cells of the body.
Answer:
Shape, Size, Height, Type of Food
Explanation:
The color is the variable and the type of hummingbird can't be controlled.
