I Believe The Answer Is B. Physical Weathering.
Answer:
Dependent: Reduction
Independent: Solar Energy
Controlled: B
Explanation:
The dependent variable is what is being measured in the lab.
The independent variable is what is being CHANGED by the individual
The control is what is kept the SAME throughout the lab.
Hope this helped!
Producers get most of their energy from the sun as they are autotrophic, meaning that they contain chlorophyll which they use to make their food through photosynthesis.