Option 1: (A), (B) and (D) only -> Correctly identifies Wind, Tidal, and Geothermal as non-conventional sources while excluding Natural Gas.
Option 2: (A), (B) and (C) only -> Incorrectly includes Natural Gas, which is a conventional fossil fuel.
Option 3: (B), (C) and (D) only -> Incorrectly includes Natural Gas and excludes Wind Power.
Option 4: (A), (C) and (D) only -> Incorrectly includes Natural Gas and excludes Tidal Energy.
Hence, Option 1: (A), (B) and (D) only -> Non-conventional energy sources are renewable and sustainable alternatives to fossil fuels. Wind Power, Tidal Energy, and Geothermal Energy are all renewable sources that harness natural processes. Natural Gas, however, is a conventional fossil fuel formed from organic matter over millions of years and is non-renewable -> correct