C. Im gonna say Proteins but I am not completely sure.
Answer:
Mineral dusts are solid particles, that may become airborne depending upon their origin and the surrounding physical conditions. Lead is potential poison. It is obtained from the earth crust. The lead poisoning is a popular occupational hazard. The lead in air, when taken by the human body through respiration is responsible to cause anemia, weakness and kidney and brain damage, labored breathing and lung diseases.
Answer:
They were made in unstable conditions
Explanation: Im smarty pants
N2 + H2 -> NH3
They both have 2s after them because they are both diatomic molecules