Fact 1: Chemical bonds form when substances react with one another.

Fact 2: Vinegar and baking soda, when mixed together, react chemically to create carbon dioxide gas.

Given the two facts above, answer the question "Which action will cause chemical bonds to form?" with the following options: 
- 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


 

    Mixing baking soda and vinegar     