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.
Many Different Autisms; One Autism Spectrum. Autism. Autism is a spectrum disorder, meaning that people with autism may have a wide range of mild, moderate, or severe symptoms. From 1994 to May 2013, the autism spectrum was represented by five autism spectrum diagnoses in the fourth version of the official Diagnostic Manual.