Rhizobium bacteria obtain moisture from: A. protiens B. nodules c. legumes D. air

The correct answer is letter D, air. This is a type of bacteria that is often found in soil. Its culture is highly dependent on the moisture that develops on the ground. The water cycle provides such opportunity for these bacteria to grow in moist conditions. The evaporation and condensation of water that occurs within the atmosphere of the Earth gives these bacteria the ability to thrive.