Choose or find odd word - Canoe , Igloo , Yacht , Dinghy , Raft

B. IGLOO

Choose or find odd word - Correction , Improvement , Betterment , Elevation

D. ELEVATION

Choose or find odd word - Mosses , Lichens , Ferns , Cacti

D. CACTI

Choose or find odd word - Square , Rectangle , Triangle , Cube

D. CUBE

Choose or find odd word - Gasoline , Methane , Asphalt , Paraffin wax , Diesel

B. METHANE