Question

how does capillary action help sustain life? a. plants use capillary action to move water from their roots to their leaves. b. capillary action allows water to form droplets. c. animals rely on capillary action to maintain their body temperature. d. water’s capillary action allows many different substances to dissolve in water. please select the best answer from the choices (a, b, c, d) provided.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Plants use capillary action to move water from roots to leaves (xylem transport uses capillary action, adhesion, cohesion), this is correct. But let's check others.
• Option B: Capillary action alone doesn't form droplets; surface tension and cohesion are more related to droplet formation, so B is incorrect.
• Option C: Animals (e.g., humans) use mechanisms like sweating, shivering, not capillary action for body temperature regulation, so C is incorrect.
• Option D: Lungs' gas exchange is via diffusion across alveoli - capillary membranes, not dissolving substances via capillary action in the way described. Capillary action is about liquid movement in narrow spaces, not gas exchange dissolution. So A is the best.

Answer:

A. Plants use capillary action to move water from their roots to their leaves.