Cohesion enables water's upward pull in plants

Steps:

• Recognize the question focuses on attraction between water molecules themselves.
• Recall key terms: cohesion for like-molecule attraction, adhesion for unlike surfaces.
• Link to biology: in xylem, cohesion forms continuous water columns against gravity.
• Eliminate unrelated terms like molecular properties or substance affinities.

Why B is correct:

• Cohesion is defined as the intermolecular attraction between identical molecules, like water to water, creating surface tension vital for capillary action in xylem.

Why the others are wrong:

• A: Adhesion describes water's attraction to other substances, such as xylem walls, not water to water.
• C: Hydrophilic refers to materials that attract water, not the attraction among water molecules.
• D: Polar describes water's molecular charge distribution enabling attractions, but not the attraction itself.

Final answer: B