About 30 miles into the earth, the speed of seismic (earthquake) waves increase. What does this change in speed indicate about the material through which the seismic waves are traveling?

answer; /// i believe the correct answer is (thrombocytopenia); (a)

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.