That is a pretty broad thing. There is a changing of the guard at Arlington national cemetery and other memorial places across the country. They also do it in England at some of there important and historical sites. It usually refers to a event that happens when the Soldiers who have been stationed at one of these sights are rotated out in a very ceremonial manner. There are plenty of examples on youtube that you can look up.
Answer:
When highlighting the commercial importance of a city we need to talk about how the city has created a commercial impact.
Rio de Janeiro is a megacity in Brazil and considered one of the most populous.
The following are some of the commercial importance of Rio de Janeiro:
1. Employment: with the economy growing and more sectors expanding, the city has generated several employment opportunities.
2. Tourism
3. Source of revenue generation for businesses.
4. Some Universities are situated there, therefore instrumental in conducting academic research.
5. It supports different occupations such as farming, teaching, and so many others.
6. It increases the country's GDP.
Yes they did. Most likely, they were new people.
A presidential republic is one where the president is also the head of state, but he isn't involved in the legislative process and has his own executive branch. An example of this can be the government of the United States of America. Opposite of this would be a separation of powers where a president would not also be the head of the government.
Answer:
President Roosevelt owned the land where the canal would be built
