Final answer:
Digesting food involves physical and chemical breakdown, and the human body employs enzymes, acids, and muscle contractions to overcome these obstacles.
Step-by-step explanation:
Digesting food involves various obstacles that the human body must overcome. One obstacle is the physical breakdown of food, which begins in the mouth through chewing and continues in the stomach through muscle contractions. Another obstacle is the chemical breakdown of food, which involves the secretion of enzymes in the mouth and stomach, as well as bile from the liver in the small intestine. The human body offers several solutions to these obstacles, such as the presence of enzymes and acids to break down food, and the use of peristalsis to move food along the digestive tract.