CAN ANYONE HELP ME ON ANY OF THESE QUESTIONS

first one is A And the first one is B I don't know the rest sorry

Alternative energy technologies are technologies that use the renewable energy sources like wind, sun and water to produce energy. These technologies range from solar power, wind power, hydroelectricity, biomass and biofuels. The biggest benefits are that these technologies use renewable resources that are naturally replenished (In contrast, fossil fuels are finite resources) and that they produce green energy and don't harm the environment. Disadvantage is that these renewable resources are unpredictable.