Answer:
Poor planning, and disease
Explanation:
The obstacles that the French faced while attempting to build a canal across Panama were diseases and poor planning. The French dealt with constant outbreaks of malaria and yellow fever, which slowed construction and caused the deaths of thousands of workers. The French also did not take into consideration the geographical differences between the Suez Canal region and the Panama region. The French had succeeded in building a canal at sea level in Egypt, and they mistakenly thought a similar design would work in Panama. However, the difference in the Atlantic and Pacific Ocean sea levels, as well as the difference in elevation of the Panamanian terrain, prevented them from building a sea-level canal. The United States knew about these two problems when they undertook the project. They took preventative measures by reducing the disease-spreading mosquito population and using a canal-lock system to overcome the elevation obstacle in Panama.
Social, cultural and economic factors influence fertility, mortality and migration rates. Migration is affected by various factors like age, sex, marital status, education, occupation, employment etc. Age and sex are main demographic factors that affect the migration.
The answer is Crude birth rate
Answer: You could use old documents to help you make new medicine.
Explanation:
The correct answer is - at the low left part of the map.
The maps have multiple elements, and one of those elements is the scale. The scale can be found on the lower part on the map, on the left side. It serves to give us the information about the distance on the map, in comparison to the actual distance in reality. This information can be shown either as unit to unit, or as measurement to measurement.
Example:
1:100,000
This means that one unit on the map, will be equal to 100,000 same units in actual distance. So 1 cm on the map, will be 100,000 cm in real life.
