Which factor below reduces our ability to address many environmental health problems?

scientists don't understand how most infectious diseases are spread.

most environmental health problems are in rural areas, far from health professionals.

people in developed countries don't care about the health of those in developing countries.

affected regions may not have the political will or financial means to address environmental problems.

Affected regions may not have the political will or financial means to address environmental problems.

Explanation:

The spread of diseases due to contaminated land, water, soil and the overall environment cannot be prevented due to lack of political will and lack of financial will. As a good influence of the political party is necessary to clean up the environment, preventing pollution and contamination.

The financial means aids in diagnosis and treatment of environment related diseases and disorders. But in the absence of these aids the spread of diseases and related disorders will increase and such problems cannot be resolved. People cannot afford suitable treatment for their problems.  

a. i. only is correct.