In the 1920’s, tires were sunk along the Florida coast to create artificial barrier reefs. Because many of the tires are constantly in motion, no marine life has been attracted to this artificial habitat. Now marine biologists are in the process of removing the tires from the ocean floor. Which statement best describes the reason the tires are being removed? Scientists are making space for natural reefs to develop.
Marine life has evolved and is no longer attracted to the material.
New observations have led scientists to reconsider their original hypothesis.
The scientists formed their hypothesis after the investigation had taken place.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.