increase the efficiency of photosynthesis greater immunity of crops against diseases fewer bacteria in soil and in living organisms more usable nitrogen for other plants
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which effect would the growing of legume crops such as beans and soybeans have?
Possibilities:
- increase the efficiency of photosynthesis
- greater immunity of crops against diseases
- fewer bacteria in soil and in living organisms
- more usable nitrogen for other plants

more usable nitrogen for other plants