The part of a leguminous plant where bacteria like Azotobacter can be found is

Bacteria like Azotobacter are found in the root nodules of leguminous plants. Leguminous plants, such as beans, peas, and peanuts, have a symbiotic relationship with certain bacteria, including Azotobacter. The bacteria are able to take nitrogen gas from the air and convert it into a form of nitrogen that the plant can use for growth, in exchange for carbohydrates that the plant produces. The root nodules of the leguminous plant provide a suitable environment for the bacteria to live and carry out this process, which is important for the growth and development of the plant. Therefore, the correct option is "in the root nodules".