Biology

The correct order in primary succession is: D.Rocks, Lichens & Mosses, Bushes & Shrubs, Trees.

Explanation of the sequence:

1.Rocks: Primary succession begins on bare rock or a surface where no soil exists (such as after a volcanic eruption or when a glacier retreats).

2.Lichens & Mosses: These pioneer species are the first to colonize the barren rock. Lichens and mosses are hardy organisms that can survive in harsh conditions and start the process of breaking down the rock to create small amounts of soil.

3.Bushes & Shrubs: As soil begins to form and thicken, it can support the growth of small plants like grasses and shrubs, which further enrich the soil and provide more habitat for other species.

4.Trees: Over time, as the soil becomes more developed and nutrient-rich, larger plants like bushes and eventually trees can take root, completin...