Research into the evolution of humans has found that our ancestors lived: a) solitary lives and only recently have we started to form social groups. b) in social groups their whole lives. b) in social groups at the beginning of their life but not as they started their own family. c) solitary lives, much like what we do today.

Which sentence best explains how steam power changed agriculture in england between 1810 and 1850? a. farmers started using steam-powered machines to spray chemical fertilizers and pesticides. b. livestock farmers began using steam-powered machines to milk cattle and shear sheep. c. steam-powered railways transport and sell agricultural produce far from where it was grown. d. steamships to transport large numbers of people from the united states to english farms.

What are the biggest challenges facing the average american citizen today? explain.

What were four reasons for the decline of spain as a world power