HLP DONT ANSWER if you DONT know the CORRECT ANSWER. Select the correct answer from each drop-down menu. Complete the passage about the nitrogen cycle.

During nitrogen fixation, specialized bacteria living in Earth’s 1) convert nitrogen taken from the 2) onto ammonia. Another set of bacteria convert the ammonia to compounds called nitrates that plants and animals can use.

1. A. cryosphere, B. geosphere, C. atmosphere
2. A. hydrosphere, B. atmosphere, C. geosphere