Assuming that transpiration rate remains constant, which of the following requires larger forces pulling water through the xylem?

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All of these factors contribute to requiring larger forces to pull water through the xylem. Drier soil makes it harder for roots to absorb water, necessitating stronger forces to move water. Taller trees require more force to move water to greater heights against gravity. Smaller diameter xylem vessels increase resistance to water flow, requiring more force to move water through them. Fewer xylem vessels mean that the same volume of water must be moved through fewer pathways, also increasing the force needed.

Assuming That Transpiration Rate Remains Constant, Which of the Following