Final answer:
The Centers for Medicare & Medicaid Services (CMS) is the agency responsible for monitoring nursing homes to ensure compliance with OBRA regulations.
Step-by-step explanation:
The government agency responsible for monitoring nursing homes to ensure they are following OBRA regulations and meeting the government's standards is the Centers for Medicare & Medicaid Services (CMS). The OBRA, or Omnibus Budget Reconciliation Act, sets forth various standards for nursing home care and CMS is the federal agency that oversees the compliance with these regulations. Other entities like the FDA regulate food and drugs, OSHA ensures workplace safety, and DHS handles security and emergency matters, but it is CMS that deals with the oversight of nursing homes.