The MAIN purpose of digestion is to:

The primary purpose of digestion is to break down food into smaller, soluble components that the body can easily absorb. This process involves the mechanical and chemical breakdown of food in the digestive tract, allowing nutrients to be released and made available for absorption into the bloodstream. Making food soluble is essential because only in this form can nutrients, such as carbohydrates, proteins, and fats, pass through the intestinal wall and enter the circulatory system for distribution to the body's cells.

Options focusing on producing hormones, eliminating waste products, or absorbing oxygen from food do not accurately capture the primary function of digestion. While hormone production plays a role in metabolic regulation, waste elimination is a process that occurs after digestion has taken place, and the body does not absorb oxygen from food—oxygen is primarily obtained through the respiratory system. Thus, making food soluble is crucial for efficient nutrient assimilation, leading to the correct identification of this answer.