Question

wading bird nests (everglades ecosystem)
year
over what 2 - year period did the greatest change occur in nest number for storks?
2002 - 2003
2005 - 2006
2008 - 2009
2016 - 2017

Explanation:

Step1: Find nest - numbers for each 2 - year period

For 2002 - 2003: Estimate nest numbers from the graph. In 2002, the number of wood stork nests is around 1500, and in 2003, it is around 3500. The change is $3500 - 1500=2000$.

Step2: For 2005 - 2006

In 2005, the number of wood stork nests is around 700, and in 2006, it is around 2500. The change is $2500 - 700 = 1800$.

Step3: For 2008 - 2009

In 2008, the number of wood stork nests is around 100, and in 2009, it is around 4000. The change is $4000 - 100=3900$.

Step4: For 2016 - 2017

In 2016, the number of wood stork nests is around 1200, and in 2017, it is around 1200 (little change). The change is approximately $1200 - 1200 = 0$.

Answer:

C. 2008 - 2009