2. Which type of living thing helps to fix nitrogen in the soil? a) Fungi b) Bacteria c) Plants d) Animals

**b) Bacteria**<br /><br />Certain bacteria, such as *Rhizobium* and *Azotobacter*, are capable of fixing nitrogen from the atmosphere into a form that plants can use. These bacteria often live in the soil or in symbiotic relationships with the roots of legumes.