Firstly they are not membranes and they are villi's which increase the surface area during digestion
Since we were given only one point, we have to test each exponential function for the point

Since exponential functions are of the form

, The correct option is between option A and option C.
For option A,

On substitution, we have;



.
Since the point satisfied the exponential function

, the exponential function goes through it.
Hence the correct answer is option A.
No need to test for option C again.
Answer:
Transition
Explanation:
Secondary succession occurs when the existing vegetation is removed by some disturbances and soil is already present in the region to support the growth of new species. During succession, the early species are being replaced by later successional species.
In the given example, the forest has patches of early species and later species. This means that the forest is in the transition period of succession where early species were not completely replaced by the new species. Once the early species will be removed and the climax community develops, the forest has reached the final stage of succession.