An earthquake is the shaking of the ground cause by seismic waves. Almost all earthquakes occur when pent up stress in rocks along large, active faults (like the SAF) is suddenly released as the rock breaks.n earthquake is the shaking of the ground cause by seismic waves. Almost all earthquakes occur when pent up stress in rocks along large, active faults (like the SAF) is suddenly released as the rock breaks.
Autism spectrum disorder - Causes. Causes of autism spectrum disorder. The exact cause of autism spectrum disorder (ASD) is currently unknown. It's a complex condition and may occur as a result of genetic predisposition (a natural tendency), environmental or unknown factors. Genes.
Children with autism have difficulty letting others know what they want or need until they are taught how to communicate through speech, gestures, or other means. Repetitive Behaviors. Although children with autism usually appear physically normal, odd repetitive motions may set them apart from other children.