It is true
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Fossil fuels . . . coal, oil, natural gas
Among primitive cultures, wood is an important source.
Answer:
volume is the correct answer
Explanation:
All the boats operating at night requires Navigation light.
Navigation light helps prevent collisions between boats and see if visibility is poor. The types of boat are : Rowboats, Tug boats, Vessels, Sailboat etc.
Various boats have different lightning color to show its use and side of the boat.