The correct answer is option D.
The consequences are loss of timber and of the environment in which wildlife live in.
During mantle convection, heat from the earth's core causes material in the mantle to expand and move upward. When it reaches the top, it cools,moves to the side, and sinks, making a circular pattern. This creates a continuous current of hot and cold material, leading to the movement of tectonic plates.
Sand can be trucked in from other sources and filtered for sediments to eventually make way into the air and water. They can also build seawalls, revetments, and jetties along the shoreline. :)
