Question

Choose the correct statements.
A lake which is rich in organic waste may result in:
1. The increased population of aquatic organisms due to minerals.
2. Algal blooms can severely lower oxygen levels in natural waters.
3. The increased population of fish due to lots of nutrients.
4. Mortality of fish due to lack of oxygen.

• A. 1 and 2
• B. 2 and 4
• C. 2 and 3
• D. 1 and 4

Answer 1

The correct option is B 2 and 4

When the environment becomes enriched with nutrients, it can be a problem in marine habitats such as lakes as it can cause algal blooms. The algal blooms can severely lower oxygen levels in natural waters. And this leads to the mortality of fish due to oxygen.