Answer: salt
Freshwater is defined as having a low salt concentration, usually less than 1%.
Explanation:
Freshwater refers to the bodies of water that contain very low levels of dissolved salts. So, freshwater are unique for their low salt content (about 0.5% of salt) compared to the sea water with high salt content.
Examples of freshwater include rivers and spring
Likely to be a poisonous nuclear power plants waste would concern her of her own health issues and family and Community
Spontaneous mutations in the bacterias DNA
C) DNA or protein sequences of shared genes.