Given that chemical changes is a form of change of matters that deal with the combination of various substances to form a new substance entirely that has different chemical and physical characteristics from its parents' substances.
Hence, when Animal waste is acted upon by anaerobic bacteria to produce biogas it is considered a chemical change.
Similarly, when biogas burnt as fuel it is also considered as a chemical change.
Therefore, in this case, the correct answer is "Both Change A and B" are chemical changes.
One benefit of eating honey is that it could increase your insulin level and help control your blood sugar. Replacing sugar with honey can also be beneficial, considering how honey is a source of antioxidants and has anti-inflammatory properties.
