Answer:
<em><u>CERE</u></em><em><u>BROSPINAL </u></em><em><u>FLUID</u></em>
<em><u>(</u></em><em><u> </u></em><em><u>CSF)</u></em><em><u> </u></em>
Explanation:
- the clear watery liquid that surrounds the brain and spinal cord and fills the four cavities or ventricles of the brain is known as CEREBROSPINAL FLUID
hope it's helpful
the air and all the gasses
B. larger and more complex
Explanation: As the environment became more unpredictable, bigger brains helped our ancestors survive.
Antibiotics in their name say they kill living things viruses are not living things. (Meme this as you may.)
