Directions(Qs. 28 to 31):Study the grid below and answer the following questions. W F H J I O K G B N M U T F D D V H U F E A S F V X T W U F X X E S U N O S G S S E A I R V C H V J E T A H X A A T O S F O S H U F G M L C T X E P A S A X C O F D O K B G A R F A A L F D B G A I I V D D V B G Z Y O E S E X B O Y R G B J V D T J Q S S B B D I E S E L C N G A S O L I N E G H K K S X I D R L M G E O T H E R M A L W C D U I H Y J H G E H H S F G A F P E T R O L D S J T H T Q E R F V H D I U S A T E L E Q W F C S Z A L E A F R E D Q Which hidden source of energy is obtained by extracting heat from the earth and then transferring it for use in homes?

• A. Geothermal 
• B. Biomass
• C. Natural Gas                
• D. Gasoline