The correct answer is Water, H2O. One oxygen and 2 hydrogen ions.
A general term for narrowing would be contracting. I assume that this is applicable to the rectum, as it is a muscular tissue, and muscles are able to expand (extend, rather), and contract.
Hope this helps. And I hope I'm the brainliest!
What kind of force? There are lots of forces acting on the car at this point.
