Which statement is true about water molecules?
a. the oxygen atom has a negative charge.
b. the hydrogen adams do not share electrons.
c. water molecules move randomly around each other.
d. water molecules cannot dissolve many substances.

The correct answer is A. The oxygen atom has a negative charge.

Explanation:

because at the water molecule there is a covalent bond between Hydrogen atoms and Oxygen atom and in this bond the oxygen atom can attract the shared electrons more than the hydrogen atom , this result an unequal sharing of the electrons between the oxygen atom and the hydrogen atom , and this case that each molecule of water has oxygen atom with negative charge and two hydrogen atoms have positive charge

and answer D is wrong because the water called in chemistry the universal solvent , that because of its ability to solve many substance , and the substances which water cannot dissolve it is like oils and fat soluble at all

most sediment washes or falls into the river as a result of mass movement and runoff. other sediment eroded from the bottom or sides of the river.