Choose all the statements that correctly describes the challenges faced in building canals.
a. geographical and topographical challenges make canal building difficult.
b. workers sometimes die building canals, but not often.
c. weather-related problems, such as long periods of rain, can slow down the work.
d. canals are time-consuming and expensive to build.

Describe the characteristics of the nile river and the river’s importance to the people of egypt. write a paragraph of at least 5 complete sentences.

The hypothetical island country of gilder lies in the mediterranean sea off the coast of france. demographers have studied gilder for the past 50 years. at the beginning of the study, gilder had a population of 20 million. the demographers have measured birth and death numbers, as well as immigration and emigration numbers, as shown in the data table. from the data, calculate the population of gilder for each 10-year period by filling in the population (no) and population (nt) columns in the data table. use this formula to do your calculations: population size: nt = no + (b + i) – (d + e)initial population = 20,000,000

Which contenents can easily trade by traveleing the meddetaranian sea