What about water gives it all the special properties?

idk if this is what you're asking for, but water molecules are polar, so they form hydrogen bonds. This gives water properties such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

allowed for the prediction of the properties of missing elements.