Final answer:
The body releases more water through the excretory system when sweating on a hot day.
Step-by-step explanation:
When the body sweats on a hot day, it releases water through the excretory system. Sweating is the body's way of cooling down, and water is lost through tiny sweat glands in the skin. As the sweat evaporates, it takes heat from the body and leaves behind water, thereby releasing more water through the excretory system.
So, the correct answer is OD. Sweating on a hot day.
Learn more about Excretory system