Directions: The diagram below models part of the nitrogen cycle. Use the diagram to answer any questions that follow.
What happens to the nitrogen at W?
A. Its usable form is bonded with other molecules in the atmosphere.
B. Its unusable form is converted into a form that is usable by bacteria in the soil.
C. Its usable form is inhaled and turned into proteins by the rabbit.
D. Its unusable form is directly transferred up the tree roots.
choose the correct answer