Why does molecular polarity occur?
A molecule's polarity is caused when the two nuclei making up the molecule are different sizes.
Polarity is caused when electrons in a covalent bond are not equally shared.
Polarity is caused when electrons are taken by one atom in an ionic bond.
Polarity is caused when electrons are shared equally in a covalent bond.

Polarity occurs when the electrons are not shared equally in a covalent bond.

Explanation:

B. Polarity is caused when electrons in a covalent bond are not equally shared.

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.

gas

explanation:

smoke is the matter of a gas