Biological life can also affect weathering. Below are listed several ways trees can affect weathering. Which affect listed below is NOT a way trees are considered to affect weathering.

Select one:

a.
Tree roots can grow through rock cracks causing the cracks to expand.


b.
Trees roots (and other vegetation) can release acids that can cause weathering of rock.


c.
Trees (and other vegetation) when decomposing can cause chemical weathering.


d.
When a tree is growing on a rock its weight can crush the rock, as a form of mechanical weathering.