C) The development poses a serious threat to the lives of people living downslope and to people living in the developments themselves.
Explanation:
This is the statement that best describes an argument used by the author to support his position. In this text, the author describes how he is against the creation of large housing developments built on the mountains. The author gives many reasons for this position, and one of them is the fact that the development poses a serious threat to the lives of people living downslope and to people living in the developments themselves.
Explanation: why its C because it is saying, A word or phrase for one thing that is used to refer to another thing in order to show or suggest that they are similar 2.