The answer to the question is D
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European explorers came from an ancient maritime tradition. Naval practice coupled with star-tracking, as well as associated navigation technology, aided navigators by helping them stay on routes, avoiding course problems, and thus preventing them from being lost frequently.
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He urged the United States to build a modern naval fleet.
Answer:
Healthy environment indicates good and protective nature without hazards. This healthy environment supports life of all living organisms with out any problems. Healthy life gives happiness increasing the life span of the people. Thus the statement Healthy environment support healthy and happy life is true.