[Solved] Our ________ is said to be a gauge of how socially accepted we feel. A) set point B) basal metabolic rate C) erotic plasticity D) self-esteem Microorganisms: Tiny living organisms, such as bacteria, viruses, and fungi, that can only be seen under a microscope. Mining: Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an orebody, lode, vein, seam, reef, or placer deposit. Air Pollution: Contamination of the air by harmful substances including gases, particulates, and biological molecules, often resulting from human activities. Depletion Time: The period it takes for a non-renewable resource to be exhausted at its current rate of use.