For the question: "Why do developing nations tend to be more heavily affected by pandemics than developed nations?", the most proper answer would be:
B. <span>Developing nations lack the resources to control the spread of disease.
Majority of developing nations do not have the funds to properly set up hospitals, and stock on the medicine needed to counter those pandemics.
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The Indus Valley civilization began during the Bronze Age.
A president can have a impact on reform and progressiveness. It can be done by starting or strengthening programs that improve lives.
Paintings from the Middle Ages were focused on more religious subjects. Hope it help!
D.) assembly line process of production.