1. Observe: Look at the trees in the forest. Which tree do you think is the youngest?
Oldest?

did u get the answer? /? ? / me

because the light is a great source of energy for the plants to survive. (i hope this )

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs