Answer: A puddle will eventually disappear after a rainstorm ends due to evaporation. This is caused by the heat of the sun, which converts the liquid water into steam (a gas) and evaporates.
Flatworms possess excretory organs known as nephridia. Specifically as annelids, flatworms possess a variant known as metanephridia.
If the parents have black hair then all the kids would have black hair (a)
if one parent has blonde hair and the other has black hair then 2 kids would be blonde and 2 would have black hair (d)
if the parents have blonde hair then the kids would have blonde hair (c)