Although these numbers aren't quite as nice as the ones from the example, the procedure is the same so the difficulty is the same same excepting the ability to perform the calculation in your head. you may choose to use a calculator. express the numeration and denominator separated by a comma (e. g..a.2)

air quality

poor drinking water

and heavy polution

can lead to poor health

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.