Final answer:
If an organism wants to maximize their nitrogen intake, they should preferentially feed on legumes, which have the highest N content. Legume plants have a symbiotic relationship with nitrogen-fixing bacteria in their root nodules, providing a rich source of nitrogen for organisms.
Step-by-step explanation:
If an organism wants to maximize their nitrogen (N) intake, they would be wise to preferentially feed on legumes, because legumes have the highest N content. Legume plants have a mutualistic symbiotic relationship with nitrogen-fixing bacteria in their root nodules, which convert atmospheric nitrogen into a more bioavailable form.
This allows legumes to provide a rich source of nitrogen for organisms that consume them.