Peppered moths can have either a light wing color or a dark wing color. A scientist studied populations of both light and dark peppered moths over a 10-year period. A graph of the data he collected is shown in the image.

Based on the graph, which is the best conclusion to make about
changes in the moth populations by the end of the study period?

Select one:

At present, dark-winged peppered moths are being naturally
selected for survival.

A new food source has become available only to the light-winged
peppered moth.

A disease has affected only the dark-winged peppered moth.

At present, wing color is not a factor in the success of peppered
moths.