One important advantage that primary soruces have over secondary sources is that primary sources offer a firsthand account of an event - b, which isn't the case with secondary sources. Although this leaves primary sources prone to being biased compared to secondary sources.
Answer:
Global population (more info below)
Explanation:
Global population increased due to increased sanitation, medicines, and food production. Hope I helped!
Answer:
The economic and social changes of the early 20th century greatly influenced the North American and European worldview which, in turn, shaped the development of new styles of art. Artists began to question and experiment with themes of reality, perspective, space and time, and representation.
The musical genre of Reggae originated in "A. Jamaica," although it should be noted that soon after its origination it quickly spread to many of the other Caribbean islands.