Which is a pair of opposing forces that act on water as it goes down through
the soil?
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a. porosity and capillary action
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b. permeability and gravity
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c. condensation and capillary action
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d. capillary action and gravity

D. Capillary action and gravity

Explanation:

Water is best molecule to perform the capillary action but not only molecule to perform it. Capillary action is a force which able to flow the liquid in narrow manner to oppose the gravity forces, it pulls water up and oppose the downward flow of the water. Capillary action and gravity are the two forces acted upon each other in opposite direction. Capillary action and plastics are the causative factor of water logging and urban floods.

answer conditional instability;