Respuesta :
The two types of reactions do opposite chemical changes occur is synthesis and decomposition; option C.
What are chemical reactions?
Chemical reactions are chemical changes which occur in matter resulting in the formation of new substances.
Types of chemical reactions include:
- double replacement
- combustion
- single replacement
- synthesis
- decomposition
Synthesis and decomposition are opposite process because synthesis build up large substances from small ones while decomposition breaks down large substances into smaller ones.
Learn more about synthesis and decomposition at: https://brainly.com/question/21443203
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