Over a span of 20 years, scientists kept track of the
number of propeller boats that people purchased for use in
Florida's waterways. The first graph shows the change in
the number of propeller boats over those 20 years. The
second graph shows how a manatee population in the
same area changed over the same period.
Number of propeller boats
Number of Propeller
Boots over 20 Years
Time
Manatee population
Which hypothesis is supported by the data?
Manatee Population
over 20 Years
Time
A. Manatees, an abiotic factor, experienced a decline in their
population due to propeller boats, a biotic factor.
B. Manatees, a biotic factor, experienced a decline in their population
due to propeller boats, an abiotic factor.
C. Manatees, a biotic factor, experienced an increase in their
population due to propeller boats, an abiotic factor.
D. Manatees, an abiotic factor, experienced an increase in their
population due to propeller boats, a biotic factor.