In figure 7-2, are the animal burrows in b an example of chemical or mechanical weathering?

the answer is the science first you need to understand chemical and mechanical weathering you need to be smart you just need your brain to answer this

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.