Final answer:
The correct statement is option b: Lighting, soil bacteria, and industrial processes are three ways nitrogen gas can be converted into a form that can be taken in by producers.
Step-by-step explanation:
According to the information provided, the correct statement is option b: Lighting, soil bacteria, and industrial processes are three ways nitrogen gas can be converted into a form that can be taken in by producers.
Nitrogen is a critical element for living organisms, but it exists in the atmosphere as N₂, which cannot be directly used by most organisms. Nitrogen fixation is the process by which nitrogen gas is converted into a usable form. Lightning, soil bacteria, and industrial processes are three examples of how nitrogen gas can be converted into a form that can be taken in by producers.