Final answer:
The growth hormone (GH), also known as STH, is essential for the growth and development of bones and tissues and is produced by the pituitary gland.
Step-by-step explanation:
The true statement about STH (Somatotrophin or growth hormone) is B. STH is essential for the growth and development of bones and tissues and is produced by the pituitary gland.
Growth hormone (GH) is a protein hormone that promotes protein synthesis, tissue building, and growth. It is produced and secreted by the anterior pituitary gland. GH accelerates the rate of protein synthesis, particularly in skeletal muscle and bones.