Auxin causes a plant to grow larger by Stimulating the acidi

Auxin causes a plant to grow larger by:

Solution

Auxins are a group of phytohormones that helps in cell elongation by stimulating wall-loosening factors, such as elastins, to loosen cell walls. The loosened cell walls are stretched by the turgor pressure, which pushes the cell walls to elongate.

Thus, the first option, Stimulating the acidification of cell walls, causing them to loosen and stretch via turgor pressure, resulting in larger cells, is correct answer.