estuary habitat restoration activity

(i) the reestablishment of chemical, physical, hydrologic, and biological features and components associated with an estuary;

(ii) except as provided in subparagraph (C), the cleanup of pollution for the benefit of estuary habitat;

(iii) the control of nonnative and invasive species in the estuary;

(iv) the reintroduction of species native to the estuary, including through such means as planting or promoting natural succession;

(v) the construction of reefs to promote fish and shellfish production and to provide estuary habitat for living resources; and

(vi) other activities that improve estuary habitat.