Which of the following changes in the last half century have caused the most financial stress on our social security system. life expectancy after retirement has increased
Fewer amount of workers
wage cap is too large
number of people retiring is too high

Which best explains why england had the highest standard of living in the world in 1990? a.england started industrializing before the rest of the world b.england had the highest population in the world. c.england hadthe most fertile soil in the world. dengland had more natural resources.

Some fossils provide evidence to suggest that earth's climate has changed over time. which information can scientists obtain from these fossils? check all that apply

Scientists think that convection currents flow in earth’s a. continents. b. mantle. c. lithosphere. d. inner core.