Third option: Most people live in large urban areas
I think that they are used for fund to make the school neater and for school activities and uniform (and I think a bit extra pay) but more advanced
According to me, no animal would be able to survive in a condition where the sunlight is blocked. As the sunlight is blocked, plants will not be able to make their food as they need sunlight for the process of photosynthesis. As the plants will not get enough nutrition due lack of food, they would eventually die. By this, the herbivorous animals which feed on plants, would not get their food . Also, the the carnivorous animals which depend on the herbivorous animals for food, would not be able to satisfy their hunger as the animals they feed on would be weak or maybe even dead.
