Climate change............
Light is not different. First sentence says "light can move through matter or through empty space."
We could separate this region into developed nations (such as north west America, eastern Asia , and wester europe) and non-developed nations (such as most region in africa, some regions in middle east and some region in eastern europe)
The consumption of food, water and energy in developed nations is clearly in abundance. If you go to any trash can in developed nations, you will see many residual food that people would throw simply because they do not want it anymore.
In non-developed nations on the other hand, most people would be desperate to obtain all of those things. Even the food that being thrown out by people in developed nation will be a luxury for them.
Answer:I think it is ecology
Explanation: because ecology study about the interaction between people and environment
