Some forests develop after farmland is abandoned. Grasses may be overtaken by pine trees which are eventually replaced by hardwood trees. During this process, the soil also changes. Which change during this process is a form of chemical weathering?

The recycled organic matter from trees reduces the pH of the soil

Explanation:

 It is known that in the presence of dense forests, chemical weathering has shown to be intense and in consequence the erosion is low. On the other hand, when the vegetation is open, chemical weathering isn't intense and erosion increases

gland  a group of cells that secretes substances into the blood or directly into an organ

hormone a substance produced by cells that helps specific groups of cells to perform specific function

duct a channel or tube that conveys a substances