What are signs and observations of these things boiling water, baking a cake, burning wood painting a door and you must tell me what types of changes they undergo.

I believe Enthalpy is the scientific term for the changes. The specific changes each item listed undergoes is hard to say correctly without knowing the options. Could you list the answers to choose from so I can get a better understanding of what they want in the answer?

Confused on question what should we be answering