The correct answer is: A. Algal Blooms.
Algal blooms are a rapid increase in the population of algae in a water body. They can occur naturally, but are often caused by human activities such as pollution. Algal blooms can have a number of negative effects on the environment, including:
- Depleting oxygen levels in the water, which can kill fish and other aquatic life.
- Producing toxins that can harm humans and animals.
- Interfering with recreation and tourism.
Sulphur dioxide is a gas that is released into the atmosphere by burning fossil fuels such as coal and oil. It can also be released from industrial processes. Sulphur dioxide can react with water vapor in the atmosphere to form sulphuric acid, which can then fall to the ground as acid rain. Acid rain can damage plants and animals, and can also pollute water bodies.
Algal blooms are often a sign of sulphur dioxide pollution. This is because sulphur dioxide can stimulate the growth of algae. When algae blooms occur, they can take up a lot of oxygen in the water, which can kill fish and other aquatic life. Algae blooms can also produce toxins that can harm humans and animals.
Bryophytes, lichens, and protozoa are not typically associated with sulphur dioxide pollution. Bryophytes are small, non-vascular plants that live in moist environments. Lichens are a symbiotic relationship between a fungus and an alga or cyanobacterium. Protozoa are single-celled organisms that are found in a variety of habitats, including water, soil, and the human body.