Question

how does the circulatory system help the body maintain homeostasis?
○ it delivers oxygen, nutrients, hormones, and other important substances throughout the body.
○ it brings oxygen from the environment into the body, keeping oxygen at constant levels.
○ it keeps levels of water and waste in the blood within a normal range.

Explanation:

The circulatory system transports oxygen, nutrients, hormones etc. throughout the body which is crucial for maintaining homeostasis. Bringing oxygen from the environment is mainly the function of the respiratory system. Keeping water and waste levels in blood normal is more related to the excretory system.

Answer:

It delivers oxygen, nutrients, hormones, and other important substances throughout the body.