Answer:
A)legumes
Step-by-step explanation:
A legume is a group of plants which belongs to the family Fabaceae. These plants can be characterised by having root nodules in their roots especially which are the house of the nitrogen-fixing bacteria.
The legumes are known for their seeds and fruits which are very rich in protein and low carbohydrates so they are commercially grown by the farmers.
In the give question, since the given bean plants belongs to the family Fabaceae which are very rich in protein therefore legumes is the correct answer.