Environmental protection is the third pillar and to many, the primary concern of the future of humanity. It defines how we should study and protect ecosystems, air quality, integrity and sustainability of our resources and focusing on the elements that place stress on the environment

The Correct choice is C
<u>Demography</u> is the study of human populations and how they grow or decline.
Explanation:
is this for health or science because there are two different awnsers
The Mississippi, Missouri, Tennessee, and the Ohio River