Explanation:

During the rainy season, plains can become slippery due to the presence of a substance called BGA (Blue-Green Algae). BGA is a type of bacteria that thrives in moist environments, such as wet soil or standing water. It forms a thin layer or film on the surface of the ground, making it slippery to walk on.

Here is a detailed explanation of why BGA causes plains to become slippery during the rainy season:

1. Formation of BGA: Blue-Green Algae, also known as cyanobacteria, is a type of bacteria that has the ability to photosynthesize. It uses sunlight to produce energy, and in the process, it releases a slimy substance.

2. Slimy layer: When it rains, the water on the plains provides a suitable environment for the growth of BGA. The bacteria multiply rapidly and form a slimy layer or biofilm on the surface of the ground.

3. Slippery surface: The slimy layer created by BGA on the plains becomes the main reason for the slippery surface. As the layer gets wet, it becomes even more slippery to walk or drive on. The sliminess reduces the friction between the shoes or tires and the ground, making it difficult to maintain balance.

4. Green color: BGA can also give the plains a greenish appearance. The bacteria contain pigments that contribute to their green coloration. This green hue can be observed on the soil or grassy areas where BGA is present.

5. Other factors: While BGA is the main reason for the slipperiness of plains during the rainy season, there can be other factors as well. For example, the rainwater can mix with clay or silt present in the soil, creating a muddy surface that is also slippery.

In conclusion, the presence of Blue-Green Algae (BGA) during the rainy season causes plains to become slippery. The bacteria form a slimy layer on the surface of the ground, reducing friction and making it difficult to walk or drive on. It is important to exercise caution and take appropriate safety measures when encountering slippery plains to prevent accidents or injuries.