I need help give real answers

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.