Answer:
It needs to go through a chemical reaction
Step-by-step explanation:
Natural resources undergoes chemical reaction to become synthetic materials.
Natural material undergoes several chemical changes to chnage the characterstics of the resources into synthetic material.
Some examples of synthetic materials are medicines, plastics, and new fuels which are extracted from trees or plants, natural fibers, and petroleum.
Hence, the correct option is "It needs to go through a chemical reaction".