What ecosystem is most likely to be found closest to the equator

What are new social classes emerged due to advancement in agriculture ?

What explains the increase in life expectancy in botswana? a. the increased availability of jobs and an improved economy b. access to antiretroviral drugs, hiv/aids education, and widespread hiv/aids testing c. a series of military takeovers that stabilized the political system and led to education reform and increased literacy rates d. a recent military coup that led to an improved healthcare system select the best answer from the choices provided.

Which of the following was probably the most difficult challenge facing construction of the railroad?