What is the correct sequence of organisms if a community is going through secondary succession?

a. grasses establish themselves in the community

b. shrubs establish themselves in the community

c. soil formation occurs

d. trees establish themselves in the community c - a - b - d a - c - b a - b - d d - c - a - b?

The correct sequence is c - a - b - d.

Soil formation occurs, grasses establish themselves in the community, shrubs establish themselves in the community and trees establish themselves in the community.

Secondary succession refers to the changes in vegetation of an ecosystem after all or portion has been destroyed due to natural or manmade effect such as wildfires or human alterations. Secondary succession is a much more rapid process than primary succession because the soil and nutrients are already available. Examples of secondary succession include the renewal of a forest after a fire and the renewal of a crop after harvesting