The two pieces of evidence that best support this paragraph are "Our water supply is finite, which means that we do not have an endless supply" and "We need to consider future generations ..."
This paragraph is about the importance of water conservation. Moreover, the two main reasons the author provides in this paragraph are:
Based on this, the details that directly support these two ideas and the main idea should be included.
This means, the details "Our water supply is finite, which means that we do not have an endless supply" and the detail "We need to consider future generations who will not have a sufficient supply of water unless we are concerned with how we use our water today" are the most appropriate.
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