Background information: Life expectancy is the number of years the average citizen is expected to live. These predictions were created by the US Census. Life expectancies in the United States have gradually over time. By 2020, the average American is expected to live for about years.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

When looking at research about instructional strategies, make sure the research is a. from peer-reviewed studies. b. approved by state and federal government organizations. c. online and easily accessible. d. about the same topic you're interested in.

Ahands-free device may only be used if it can be activated or deactivated with a