You are presented with the question "Which action will cause chemical bonds to form?" and the following answer choices: 
- A compound that donates proton
 - igniting fuel and oxidiser
 - nuclear reactions
 - Mixing baking soda and vinegar
 - By wind and rain
 - heat and pressure
 - converting electricity to heat
 - production of energy

Now knowing that chemical bonds form when substances react with one another and vinegar and baking soda, when mixed together, react chemically to create carbon dioxide gas, choose the best answer.


 

    Mixing baking soda and vinegar     