In the mutualistic symbiosis between bacteria in the family Rhizobiaceae and leguminous plants, how do the two organisms benefit?
a) The bacteria provide nitrogen fixation to the plants, while the plants provide sugars to the bacteria.
b) The bacteria provide sugars to the plants, while the plants provide nitrogen fixation to the bacteria.
c) The bacteria provide protection from predators to the plants, while the plants provide shelter to the bacteria.
d) The bacteria and plants compete for resources, leading to mutual survival.