Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
It's Like a Puzzle Pieces and that Every Piece Goes together and Holds everything in Place or a Big Clothes Hanger :D You Good?
