Which of these is a advantage of growing legumes

Nitrogen is a key element in crop productivity and protein production. With this being said, legumes tend to be highly rich in protein. In crop rotation, or the practice of growing many different types of crop species in the same area for many seasons, legumes are often utilized. (Got that from google)

11. gene12. allele13. crossing over14. linked15. gene16. x17. males, femalesapologies if numbers are out of order.

What’s the question here ?