The atmosphere of Earth is the layer of gases, commonly known as air, retained by Earth's gravity, surrounding the planet Earth and forming its planetary atmosphere.
Establishment of European colonies.
The Age of Exploration did lead directly to the establishment of European colonies as well as a global trade network.
Answer: Are you in 6th grade? :0 i just learned ancient civilizations, it's A, by the way
Explanation: They wanted durable currencies that wouldn't break because it would be difficult to start trade and purchase the goods, and if they did break, they'd just be losing money, technically.
Answer: Social epidemiology is the study of the causes and distribution of diseases.
Explanation: Social epidemiology studies which are the determinants of health and diseases in the world.<u> This discipline focuses on the role that social structures play in the health of individuals and populations</u>, that is to say<u> it studies how social conditions affect health levels and attract diseases. </u>Therefore, social epidemiology establishes a relationship between the distribution of social advantages and disadvantages and the distribution of health and disease.