[Solved] Which instruction is used to call other programs from a main program? A) Branching B) Looping C) Register D) Call Physical: Relating to the body as opposed to the mind or emotions, or being in a material state. Occult Blood: Blood that is not visible to the naked eye, often detected in stool or urine samples through laboratory tests. Peristalsis: The series of wave-like muscle contractions that moves food through the digestive tract. Irritable Bowel Syndrome: A chronic gastrointestinal disorder characterized by abdominal pain, bloating, and alteration of bowel habits without any organic cause.