D.
It produced reproductive cells.
Trust
I believe the biosphere is fragile, because over time all of the pollution us humans have made; If its from air pulloution, acid rain or even water pollution. the toxic acids over time have made the biosphere and the ozon layer weaker and more thin. which causes the biosphere to become weaker.
Might use the bathroom a lot to get rid of most of the blood because urine is water and if the water changes, the blood changes, so urine might happen if you want to get rid of all of the blood.
