Describe the functions of OSHA, MSHA, NIOSH, and EPA. Include one additional federal agency not mentioned here, and describe how it conducts inspections and enforces standards. Your essay should be at least 500 words in length and include an introduction, a body, and a conclusion. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations. ions.