The correct answer is
Unfortunately, you did not attach the photo of the shantytown.
However, trying to help you we did some deep research and found the photo.
This photo shows a shantytown built along the Willamette River in Portland, Oregon. The words that best describe the buildings in this shantytown are disorganized and shaky.
Shantytowns were places in the outskirts of the cities where poor people lived in overcrowded spaces. Poor people built their houses used different poor-quality materials. e could say these were improvised houses. It is obvious that these shantytowns were not planned to be there and in many cases are illegal settlements.