Legumes enrich soil by adding nitrogen to it through their __

They add nitrogen to the soul through their nodules !

answer; ///i do believe the answer is (virus);

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: