What is the main reason that engineers have created tunnels? A. to dig through soft earth
B. to travel under the ocean
C. to develop new technologies
D. to make transportation easier​

Nike lives in an area that has a south-facing slope. the temperature in his area is always high. which of these abiotic factors is responsible for high temperatures in nike’s area? a. nutrients b. soil c. water d. topography

What are economic benefits of building dams

The standard deviation of a population is 3.2.what is the margin of error? enter your answer in the box.