It is a natural emulsifier. An emulsifier keeps liquids in the mix from separating, such as oil and vinegar.
Pigs are known to be some of the cleanest animals on Earth, believe it or not. They refuse to excrete where they eat or sleep, and they don't sweat!
I believe the answers in order would be A and F ! Hope this helps. Sorry if not!!
Answer:
This is Biology Textbook....
Building walls and houses, fire pits, construction materials, decoration etc...