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

Fact 2: Paper is formed by the chemical bonding of fibers.

Given the two facts above, answer the question "what is formed by substances reacting with one another?" with the following options: 
- energy.
 - glass
 - gas
 - sugar
 - paper
 - oil
 - Acids
 - matter


 

     paper    