They both have to do with your surroundings...
-Acid rain can have many effects on the enviorment, the most common being sickness to animals. Acid rain is ussaly domain to lakes, streams, rivers etc, with this being said it can harm many Fish, amphibians and reptiles that live in or near the body of water. Causing these animals to die out or even relocate. Most bodys of water that have acid rain go untouched by animals. Acid rain can also take its toll on plants as well. Plants need water in order to create their food (sugar-glucose), when the plants intake the water through their leaves it can cause malfunctions in the photosynthies process. Causing many plants to fight for their life or even perish. These are some of the many things acid rain can cause to the enviorment.
Explanation: I hope this helps! :D
Answer:
The deep holes were often used for storing WATER
Explanation:
The deep holes which surrounded the city was majorly and often used to either store WATER during raining reason or to store diverted WATER or water that flow from nearby streams reason been that the city of Dholavira is a desert and the second reason is that many years may pass without the city of Dholavira experiencing rainfall which was the major reason they often make use of the deep holes that surrounded the city to store WATER.