Question

what should you add to your ecocolumn if you want to test the effects of nutrients on your ecocolumn? styrofoam inorganic fertilizer oxygen carbon monoxide

Explanation:

To test the effects of nutrients on an ecocolumn, we need to add a source of nutrients. Inorganic fertilizer is a source of nutrients (like nitrogen, phosphorus, potassium) that can be added to observe how it affects the ecocolumn's components (e.g., plants, microorganisms). Styrofoam is not a nutrient, oxygen is a gas (not a nutrient in the context of fertilizing for plant growth in an ecocolumn), and carbon monoxide is toxic and not a nutrient. So inorganic fertilizer is the correct choice.

Answer:

B. inorganic fertilizer (assuming the options are labeled as A. Styrofoam, B. inorganic fertilizer, C. oxygen, D. carbon monoxide; if labels differ, adjust accordingly but the correct option is the one with "inorganic fertilizer")