Two functions of tentacles found in hydra?

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

maybe because its impossible for balloons to lift a whole entire house.