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.
Clinical social workers diagnose and treat mental health conditions as well. They provide individual, family, and couples therapy, and they assist with depression, anxiety, family problems, and other mental health or behavioral issues. They may work in private practice or at a mental health or therapeutic facility.