Answer:
With rising sea levels and coastal construction, shoreline erosion is something we should all care about.
Explanation:
In this sentence, you can see how the topic "shoreline erosion" is rehearsed and included as part of a situation that previously was explained.
The Shoreline erosion and the rising sea levels as well as the coastal construction form part of the variables of the thesis that wrap up the main points that determine they are all relevant to understand the importance of the topic and take a stand.
In contrast to the other options, which leave the possibility for further connecting ideas, the sentence "something we should all care about" coming at the end, provides a sense of closure and prompts the reader to meditate on the issue.
