Answer the following question given this paragraph: 

A chemical reaction is a process in which some substances, called reactants, change into different substances, called products. During the reaction, chemical bonds break in the reactants and new chemical bonds form in the products.


Q: What type of reaction is a process in which some substances, called reactants, change into different substances, called products?

 Choices:

- reversible reaction

- physical reaction

- toxic reaction

- chemical reaction

A:
chemical reaction
