The correct answer is - Changes in land forms that affect large areas also affect living conditions.
The changes in the land forms, especially when it is on a large scale, affect the living conditions for most of the living organisms in that area, including the humans. The changes in the land forms can be caused by numerous things, be it heavy rainfalls, landslides, erosion, floods, earthquakes, volcanoes. They are all able to cause big damage and big changes in very short period of time, which changes the whole environment, thus changing the living conditions as well.