The recent occurrence of both severe and prolonged droughts as well as floods is being worsened by

The recent occurrence of both severe and prolonged droughts as well as floods is being worsened by global climate change.

Global climate change is the rise in average surface temperatures on earth which occurs mainly as a result of human activities such as the use of fossil fuels, which discharges carbon dioxide and other greenhouse gases into the air. These gases trap heat within the atmosphere and this can have various effects on ecosystems, including droughts, rising sea levels, and very bad weather events.

well considering i can't see the graph, it's probably prices

the answer is:

c. economic output