ANSWER
72 . The areas located North of the Tropic of Cancer and those located to the South of Tropic of Capricorn do not experience the overhead the overhead sun 'TRUE' because during solstice the earth tilts at exactly 23 and half degrees south and north.
73. Contour lines help to identify the altitude of a certain place from the sea level 'TRUE'
74. All areas along the Equator experience the overhead sun twice a year 'TRUE' and thats on 21st March and 23rd September