The correct option is A Moss
The process of community development over time, which involves species in one stage being replaced by other species, is called ecological succession. It is divided as primary succession and secondary succession. An area is initially colonized by certain early-successional species such as Lichens, they are often the first organism to colonize an area that will undergo primary succession. Once new soil has formed in an area it gives way over time to mild-successional species, such as mosses and grasses, which in turn give way much later to late-successional species.