Final answer:
The brain helps us detect sensations on our face by receiving messages from our sense organs and interpreting the information.
Step-by-step explanation:
The brain helps us detect sensations on our face because it receives messages from our sense organs. Sense organs, like our skin, have specialized nerve receptors that detect touch, temperature, and pain. These sensations are then sent to the brain, which interprets the information and tells us what we are sensing. For example, when someone touches our face, nerve receptors in our skin send messages to the brain, allowing us to feel the touch.