Calcium is what deals with bone growth
Oil Coal and Natural Gas are the fossil fuels the USA has the most reserves of. Given that only one of them is on the answers Coal is the correct answer.
1. C) The soil will have no nutrients to grow the corn.
2. C) Crops may cause an increase of allergic reactions in humans
3. B) Decomposers
Wilbur and Orville Wright were American inventors and pioneers of aviation. In 1903 the Wright brothers achieved the first powered, sustained and controlled airplane flight; they surpassed their own milestone two years later when they built and flew the first fully practical airplane.
When writing a hypothesis, you need to be able to say IF this, THEN this will happen.