Final answer:
Excretion is important to achieve osmotic balance because it helps remove waste products and excess water from the body, preventing imbalances in osmotic pressure.
Step-by-step explanation:
Excretion is the process of removing wastes and excess water from the body. It plays a crucial role in achieving osmotic balance, which is the regulation of water movement within the body's membranes. By eliminating waste products and excess water, excretion helps to maintain the proper concentration of solutes and prevent imbalances in osmotic pressure.