Suppose that a late succession plant that is surrounded by early succession plants grows at a rate of 0.5 cm per day. if the early succession plants are removed experimentally, the late succession plants are observed to grow at a rate of 0.9 cm per day. this experiment shows that the early succession plants have a effect on the late succession plants, and this observation is most consistent with the model of succession.
a) negative; inhibition
b) positive; facilitation
c) positive; inhibition
d) negative; facilitation