(read and answer this question plz) Caroline Henderson started homesteading in the Oklahoma Panhandle in 1907. She was a published writer who wrote for various magazines. The passage below is an excerpt of a letter she wrote to Secretary of Agriculture Henry Wallace in 1935 at the age of 58. Wallace would later credit her with helping America understand farmers’ problems and the courage they exhibited. For twenty-seven years this little spot on the vast expanses of the Great Plains has been the center of all our thought and hope and effort. And marvelous are the changes that we have seen . . . The almost unbroken buffalo grass sod has given way to cultivated fields. The old trails have become wide graded highways. Little towns have sprung up with attractive homes, trees, flowers, schools, churches, and hospitals. Automobiles and trucks, tractors and combines have revolutionized methods of farm work and manner of living. The wonderful crop of 1926 when our country alone produced 10,000,000 bushels of wheat – more it was said than any other equal area in the world – revealed the possibilities of our productive soil under modern methods of farming. It seemed as if at last our dreams were coming true. . . .
Yet now our daily physical torture, confusion of mind, and gradual wearing down of courage, seem to make that long continued hope look like a vanishing dream. For we are in the worst of the dust storm area where “dust to eat” is not merely a figure of speech, but the phrasing of a bitter reality. . . .
In this time of severe stress, credit must be given to the various activities of the federal government. Without such aid as has been furnished, it seems certain that large sections must have been virtually abandoned. Yet common sense suggests that the regions which are no longer entirely self-supporting cannot rely indefinitely upon government aid. So the problem remains and the one satisfactory solution is beyond all human control. Some of our neighbors with small children, fearing the effects upon their health, have left temporarily “until it rains.” Others have left permanently, thinking doubtless that nothing could be worse.

What type of document is this? When was it written? Why was it written?