Answer:
The function of the pleura is to allow optimal expansion and contraction of the lungs during breathing. The pleural fluid acts as a lubricant, allowing the parietal and visceral pleura to glide over each other friction free. This fluid is produced by the pleural layers themselves.
<span>FOOD CHAINS FOLLOW A SINGLE PATH AS ANIMALS EAT EACH OTHER.
</span>
<span>FOOD WEBS SHOW HOW PLANTS & ANIMALS ARE INTERCONNECTED BY DIFFERENT PATHS.</span>
For example
<span>bacteria in our stomachs, intestines, etc. help us digest food, and we give them a place to stay.</span>
In the brain and spinal cord
I believe the answer is A. Lipids function as cushioning. Hopefully this helps.
