Based on the given scenario, where Plant 2 is a parasite of Plant 1, the graph that best predicts the growth of Plant 1 and Plant 2 during the experiment would be graph C.
Graph C shows that initially, when the plants are grown together, both Plant 1 and Plant 2 experience growth. However, after they are separated, the growth of Plant 1 continues, while the growth of Plant 2 declines. This pattern reflects the relationship between a host plant (Plant 1) and a parasite (Plant 2), where the parasite's growth is dependent on the host's resources. Once separated, Plant 2 loses access to the resources provided by Plant 1 and consequently experiences a decrease in growth.
Therefore, graph C is the most suitable representation of the scenario described.
