Question

what problem can occur with abandoned strip mines filled with water?
acidification of water
improved aquatic habitats
increased property value

Explanation:

Abandoned strip mines filled with water can lead to acidification. This is because minerals in the mine react with water and oxygen, producing acidic substances. Acidic water can harm aquatic life and ecosystems. Improved aquatic habitats and increased property value are not typical negative problems associated with such mines.

Answer:

acidification of water