The following graph shows the number of insects present on a field after it has been sprayed with the same insecticide once per year over four years. What is the most reasonable hypothesis for the increase in insects in year four? (SC.912.N.1.1)

Question

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1 point
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The insecticide used in year four was stronger than it was in previous years
The insects in the field in year four were the same species as in previous years
The population of insects resistant to the insecticide had increased over the four years
Insects for from a neighboring field had moved into the area before the insecticide was applied in year four

Answer 1

The most reasonable hypothesis for the increase in insects in year four is: The population of insects resistant to the insecticide had increased over the four years.

This option suggests that over time, some insects may have developed resistance to the insecticide, leading to a resurgence in their population despite the annual applications.