1 because people are voting on laws and rules direct means the people do it directly
The answer would be Nucleic Acids
Radon and Thoron are the most significant sources of radiation exposure to people living in the United States accounting for 37% of total radiation exposure.
These are nuclides that are produced from the radioactive decay of materials especially in consumer products and through natural processes such as the decay of radium.
They are reffered to as a silent mutation