Which list gives key events regarding the exploration of space in the correct order, beginning with the earliest?

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.

Which of the following would be paid for with a state’s capital budget? a) lawmakers’ salaries b) a new bridge c) the salaries of state troopers d) education

Why does the blending of many different diciplines present both challenges and opportunities to enviromental scientist?