Final answer:
Filling in parts of a harbor for industrial uses likely leads to the disruption of marine ecosystems by destroying natural habitats and negatively impacting biodiversity.
Step-by-step explanation:
The filling in of 30% of the Harbour for industrial uses most likely resulted in C) Disruption of marine ecosystems. This type of development typically destroys or degrades natural habitats, resulting in negative impacts on biodiversity and the functioning of marine environments.
Moreover, such actions do not align with sustainable practices or the restoration of natural habitats. Instead, they can lead to the displacement of native species, potentially introduce invasive species, and ultimately decrease the productivity and health of the marine ecosystem. It's important to understand that urbanization and industrialization are forms of habitat modification that can have long-term, irreversible impacts on many species.