Answer:
the mucous membrane lining the uterus, which thickens during the menstrual cycle in preparation for possible implantation of an embryo.
Explanation:
i tried
Changes in the force of contraction of the heart
It depends if you an athlete, if you workout, or if you do neither of those things. The average 16 year old that doesn't exercise regularly should consume anywhere from 150-350 grams of protein in a day.
It would be B or C. I'm SURE it would be C though.
"A" means to cause air to enter and circulate freely in (a room, building, etc.), which fire NEEDS air in order to be alive, so that would be BAD. "D" is saying to store guns in locked cabinets... which doesn't really make sense.