Final answer:
The correct answer is b. inhibition model. Plants that exude toxins into the soil, inhibiting the growth of other plant species, support the inhibition model.
Step-by-step explanation:
The correct answer is b. inhibition model.
Plants that exude toxins into the soil, inhibiting the growth of other plant species, support the inhibition model. This model explains how certain plants use chemical compounds to prevent the growth of competing plants and maintain dominance in their environment. By releasing toxins, these plants create unfavorable conditions for other plant species to grow, giving them a competitive advantage.