Answer: A mutagen is a chemical compound or form of radiation that causes mutations, which of course means a change in the dna of a cell. So, your answer would be C) an environmental agent that changes DNA.
Molecules after molecules with lots of energy
Mushu is a definitely answer
Answer:
Planting bushes
preserving trees
packing down soil
Explanation:
Not 100% positive on my answers but hope this helps!