Researchers collected seeds from a certain wild plant, and planted them in groups of "kin" (seeds of the same mother plant) or nonkin (seeds from different plants). each group of four seeds was plante

Researchers collected seeds from a certain wild plant, and planted them in groups of "kin" (seeds of the same mother plant) or nonkin (seeds from different plants). each group of four seeds was planted either together in one pot, or in a cluster of four pots that contained the same volume of soil. after 8 weeks, the researchers measured the amount of roots each plant had produced. they found that when related plants are grown together in one pot, they produced smaller root systems so as not to compete with one another. plants grown in separate containers so their roots could not touch, and nonrelated plants grown in a single container, had 15% more roots. what is the response variable?