What did the removal of these chemical tags do

Chemical tags reveal interplay of genes, environment in autism.

Explanation:

It just shows what type of DNA a person has which means the letters A, T, G and C, which represent different DNA bases, spell out the blueprint for the human body. But they aren’t the only ones that matter.

CH3 is the chemical formula for a methyl group — a carbon atom studded with three hydrogens. Methyl groups can attach to DNA and affect whether the DNA is recognized by the cell’s machinery. Different exposures and experiences — anything from air pollution exposure to stress — can make DNA more or less likely to gain or lose methyl tags.

explanation:

cause they can

the government closely monitored its finances to avoid another financial collapse.