Rhizobium:

are nitrogen-fixing bacteria
live in the nodules of legumes
convert nitrogen in soil into nitrogen compounds
all of the above

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;