Final answer:
The greatest barrier to access to health care for a poor Hispanic person living in downtown Chicago is the lack of affordable health care options.
Step-by-step explanation:
The greatest barrier to access to health care for a poor Hispanic person living in downtown Chicago is the lack of affordable health care options. Poor people, especially before the Affordable Care Act (Obamacare), frequently had little means to obtain health insurance outside of the government-run Medicaid program. Uninsured people tend to wait until they are very ill to see a doctor, often requiring a visit to a hospital's emergency room where federal law requires the provision of medical care, regardless of the patient's ability to pay.