Questions: Which statement is true of water's tensile strength? (a) It results from hydrogen bonding. (b) It helps to pull water through plants. (c) It involves both cohesion and adhesion. Both (a) and (b). (a), (b), and (c).

The answer is the last one: (a), (b), and (c).

Explanation for each option:

(a) It results from hydrogen bonding.

• This statement is correct. Water's tensile strength is largely due to hydrogen bonding between water molecules. These bonds create a cohesive force that holds the molecules together.

(b) It helps to pull water through plants.

• This statement is also correct. Water's tensile strength, along with cohesion and adhesion, plays a crucial role in the process of transpiration in plants, helping to pull water from the roots to the leaves.

(c) It involves both cohesion and adhesion.

• This statement is correct as well. Cohesion refers to the attraction between water molecules, while adhesion refers to the attraction between water molecules and other surfaces. Both of these forces are involved in water's tensile strength.

Therefore, the correct answer is (a), (b), and (c).