Saturated zone
The correct answer is saturated zone. This area contains permeable rocks and soil here is totally filled with water or we can say is saturated with the water. This zone is called as saturated zone.
Peristalsis is involuntary constriction and relaxation of the intestine or another canal, it’s causes wave-like movements that push the contents of the canal forward.
It depends on if they are identical or not really
Answer:

Explanation:
B-cells engulf an antigen by endocytosis.
<u>Endocytosis:</u>
The process by which cell takes up external materials by fusing them with plasma membrane is called endocytosis.
After engulfing the antigen, B-cells become sensitive to the pathogen.
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>