The American Chestnut by ReadWorks: The passage explains the problem of the declining American chestnut tree population. What step towards finding a solution is discussed?

Chestnut decline, attributed to blight, is caused by an Asian bark fungus (Cryphonectria parasitica), which was unknowingly imported from Asia on infected Chinese Chestnut trees. ... It spread 50 miles a year, and, within a few decades, had killed nearly three billion chestnut trees.

Explanation:

to leave the reader thinking and wandering on their own. without a resolution we are clueless to what happens next, and why it does. it may even cause suspension with the reader.

explanation:

what passage could you provide the passage.