A. One type of element but I could be wrong if not more than one type of Elena chemically bonded
Liquefaction occurs when an earthquake's violent movement suddenly turns loose soil into liquid mud. The correct answer is D.
Macrophages kill the cellular debris of the pathogens that are killed by the immune system. They are a type of white blood cells, and kill anything which does not have the proteins that are specific to the healthy cells of the body. Cancer cells, foreign substances, and microbes are engulfed by them.
