Answer:
The answer is D) carbon dioxide
Answer:
the placenta is your answer
Explanation:
the placenta provides the nutrients and oxygen to the fetus.
A dependant variable is a variable in an experiment that is being studied or measured. A dependent variable's value depends on another.
Keeping this in mind, the dependent variable would be plant growth over time. The plant's growth is affected by its light source, the amount of time it's in the light/darkness, and the species of plant.
Hope this helps!
-Moiselle