The question is incomplete as the figure is missing which has been attached.
Answer:
C,D,A,B
Explanation:
Ecological succession refers to the change in the species of a community evolved over time.
Primary succession is a type of ecological succession in which the mosses and lichens colonize a barren area like which is destructed by the volcanoes which convert the area into bare rock etc.
In the given question, image C shows that volcano is erupting after which the area is colonized by the species of Lichens and mosses which can grow on the rocks easily by attaching to them as shown in image D.
Then in image A, the mosses and lichens are removed by plants belonging to Pteridophytes like ferns and few bryophytes. Then, large trees belonging to gymnosperms and angiosperms will colonize the area as shown in figure B.
Thus, C, D, A, B is the correct answer.
