The correct answer is (b) and (c).The gradual heating of Earth's surface, oceans, and the atmosphere is caused by human activity, primarily the burning of fossil fuels that pump carbon dioxide, methane, and other greenhouse gases into the atmosphere is called Global Warming.Higher temperatures are worsening many types of disasters, including storms, heat waves, floods, and droughts.A warmer climate creates an atmosphere that can collect, retain, and drop more water, changing weather patterns in such a way that wet areas become wetter and dry areas drier.Global warming tends to reduce yields because crops speed through their development, producing less grain in the process.Higher temperatures also interfere with the ability of plants to get and use moisture.The other effects of global warming are:Massive melting of snow and land ice, glaciers.The elevated heat content of the oceans.Increased humidity results in disease spread.Change in the timings of seasonal events.Bleaching of Coral reefs.