Which of these explains why deletion of an imprinted gene can be a dominant mutation?

 Accidental exposure to mutagens- exposure to a mutagen, such as in a workplace, during chemotherapy, or warfare can cause change in DNA.  natural exposure to mutagens- cosmic rays, sunlight and radioactive minerals naturally found on earth can cause changes in the DNA

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

the answer is c a tornado