The right option is; climate change
Mount Tambora in Indonesia erupted and caused the "Year without a Summer." Over 100,000 people died from starvation because of the resulting climate change.
Mount Tambora is situated on the island of Sumbawa in Indonesia. The destructive eruption of Mount Tambora occurred in 1815, and there was release of large amounts of ash, aerosols, pumice and other rocks into the atmosphere. This event influenced the climate and causes intense weather and harvest failures in many parts around the world. Over 100,000 people perished from famine and diseases, because crops could not grow in those regions.
