Phase 1: Transpiration Pull Theory Explained The transpiration pull theory, also referred to as the cohesion-tension theory, elucidates the ascent of water from the roots to the leaves of tall plants. This upward movement is attributed to: Water molecule cohesion (mutual attraction) Water molecule adhesion to xylem vessel walls Negative pressure (tension) created by transpiration from leaf surfacesPhase 2: Ernst Münch's Role Ernst Münch is recognized for formulating the cohesion-tension theory. His research emphasized transpiration's function in generating a tensile force and water's cohesive properties in facilitating its upward transport within the xylem.Phase 3: Exclusion of Inaccurate Statements (A) Incorrect: Charles Darwin and Francis Darwin's work pertains to plant tropisms, not the cohesion-tension theory. (B) Incorrect: Stephen Hales significantly advanced plant physiology, particularly in water absorption, but did not propose this specific theory. (C) Incorrect: Henry Dixon and John Joly are linked to early hypotheses on water transport, but the cohesion-tension theory is not credited to them.