Aresult of theodore roosevelt’s philosophy about conservation was a. the creation of new railroads. b. the regulation of the food industry. c. the regulation of the drug industry. d. the creation of national parks

Option D, the creation of the national parks, is the right answer.

In the history of American conservation, president Theodore Roosevelt was one of the most powerful voices for conservation. Therefore, after becoming the president of the United States, he practiced his power to create 51 federal bird reserves, 150 national forests, five national parks,  four national game preserves,  and 18 national monuments. He used his power to protect the wildlife and public areas, through the implementation of the United States' Forest Service.  

The correct answer is C)the creation of national parks.

a. the astrolabe could determine the correct latitudinal location of the ship