A month-long study of plant growth was conducted. Three groups of plants were grown in various amounts of light: Group A received 12 hours of light per day. Groups B & C received 8 and 4 hours of light, respectively. The average rate of growth of each group is graphed here. How does the data support the idea that ALL living things have certain basic needs in common?

So basically the answer is C

Assuming the graph that shows plant groups B and C have a lower growth rate than group A, this shows that every plants needs a certian amount of sunlight to grow. Since they get their energy from the sun, it is the most crucial to a plants survival. If plants dont get the energy they need to live, as producers, primary consumers dont get get energy from producers. If primary consumer cant get energy, neither can secondary consumer and so forth.