Respuesta :

tanya100

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.

Animeaesthetic

Primary succession takes much longer than secondary succession because it involves time for weathering of rock and development of the soil horizons.