D. Ecosystems
Have a good day!!
To ensure all information is factual is the right answer.
Explanation: CDC works 24/7 to protect America from health, safety and security threats, both foreign and in the U.S. Whether diseases start at home or abroad, are chronic or acute, curable or preventable, human error or deliberate attack, CDC fights disease and supports communities and citizens to do the same.
A cultural Norm is something that a culture does regularly that we find normal.
An example is the thumbs up,in some cultures it could be found offensive, in America it's like saying good job.
