Ranging from 0.25-10mm in length, there are typically around 10,000 per square metre of soil, rising to as many as 200,000 per square metre in some places. The 6,000 known species of these wingless arthropods can be found in all manner of habitats all over the world, from beaches and cliffs to the Antarctic and the highest mountain ranges on Earth.
Social workers provide counseling/therapy at mental health centers. There are several kinds of therapy including individual therapy, family therapy, home based family therapy, behavior therapy, or group therapy.
Social workers make important contributions to society by working to improve the lives of individuals, families and groups. The exact role a social worker plays depends on the work setting, as social workers provide a broad range of services to help people in need. Social workers offer direct-care services, helping people cope with everyday problems, and clinical services, providing diagnosis and treatment of mental health issues.