The thesis statement for an expository essay on how habitat degradation is affecting the Chesapeake Bay could be:
The degradation of habitats within the Chesapeake Bay is posing significant ecological and economic challenges, leading to declines in critical species populations, disrupted food webs, and increased vulnerability to climate change, necessitating urgent conservation efforts for the preservation and restoration of this vital estuarine ecosystem.
Some possible feedback on this thesis statement could be to provide more specific examples or statistics to support the claims made. Additionally, considering the social and cultural impacts of habitat degradation on communities who rely on the Chesapeake Bay for their livelihoods could add another dimension to the argument. This can help strengthen the overall argument and provide a more well-rounded perspective on the issue.