Restrictions on human trafficking.
Dictatorship, I believe is what you are looking for.
Perceptual adaptation
ability to adjust to changed sensory input, including an artificially displaced or even inverted visual field.
Volcanoes are formed by magma working its way to the surface. When the magma erupts (now lava) it will flow and ash will fall down. When the lava cools the volcano will grow. This process keeps repeating. Eventually the volcano will be huge.
