Below is a scale drawing of the town.

The authors use the word “backbone” in lines 3 and 39 to indicate that

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

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.