B) were a secret study of the history of US involvement in Vietnam
Answer:
The introduction of American plants around the world resulted in rapid population growth in Europe.
Explanation:
The introduction of American plants including potato, tomato, maize, and tobacco and various new staple crops like maize and sweet potatoes resulted in rapid population growth in Europe.
By the 19th century, potatoes were consumed widely in Europe and became an important part of the diet in much part of Europe which leads to an estimated 25% of the population growth. Portuguese introduced Maize and cassava which replaced sorghum and millet as Africa's most important food crops.
The Checks and Balances Kees the president in charge. Especially Judicially.
Answer:
D. a president who is elected to office
Explanation:
A. is not correct as Brazil is not a monarchy.
B. is incorrect, Brazil is a democracy.
C. is not correct, as Brazil’s legislature has executive headed by the president.
<u>D. is the correct answer. </u>Brazil is a democratic federative republic. <u>President and the cabinet are the executives. President is chosen by the method of election every four years. </u>Voting is compulsory for all citizens between the ages of sixteen to seventy.