Reaction and response loop. The plant is reacting to the amount of water, therefore it begins to die from there being less of it. The response from the plant dying means the answer. I'm not sure about this, but here is my answer that I would give.
When the fossil fuels are burned they produce energy and give of harmful gas
The papaya, especially the green one, is used as a tenderizer in boiling red meat. This is because of the property of papaya's skin and leaves contain enzymes called papain. When this papain get contact to red meat the connecting tissue of the meat easily breaks down
