The lava from Mount St. Helens is made up of rock that contains around 63 percent silica minerals. The lava from Kilauea is made up of rock that contains around 50 percent silica minerals. Based on this information and your observations in parts B through E, predict at least two factors that can affect the rate at which lava flows.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.