A. marine
- as water covers of majority of earths surfaces . HOPE THIS HELPS U WELL
A rigid cell wall is found in plants so they can hold themselves up.
Answer:
Rocks or lava
Explanation:
In 1° succession there is no soil.. And the process of soil formation take very long time.
In 1° succession rocks or lava is present and lichens, soil erosion, wheathring of rocks helps in soil formation.