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

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

nucleus

would be most reasonable answer tbh