Provide two written definitions of an oxidation-reduction reaction

Oxidation is the loss of electrons while reduction is the gain of electrons. Oxidation is the addition of oxygen while reduction is the removal of oxygen.

Explanation:

Oxidation and reduction can be defined in different ways. The common ways are

1) in terms of addition or removal of electrons

2) in terms of addition or removal of oxygen

3) in terms of addition or removal of hydrogen

4) in terms of increase or decrease in oxidation number.

All definitions are valid but their individual applications are context dependent.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.