Question

primary succession
possible answers
lichen and mosses forming new soil in an area for the very first time
a volcano erupts covering the surrounding area in several feet of ash
the regrowth of an ecosystem after a flood
new land forms as a lava flow cools.
a nuclear meltdown causes the soil to become infertile. it takes many years before the soil is replenished.
grasses and small plants begin to grow from new soil
no answers chosen
secondary succession
no answers chosen

Explanation:

Primary succession occurs in areas with no pre - existing soil, like after a volcanic eruption where new land forms as lava cools or when lichens and mosses start to form new soil in a barren area for the first time. Secondary succession occurs in areas where soil is already present but has been disturbed, such as the regrowth of an ecosystem after a flood. A nuclear meltdown making soil infertile is not a typical start for primary or secondary succession as it creates extreme and long - lasting toxic conditions. Grasses and small plants growing from new soil can be part of primary succession if the soil is newly formed.

Answer:

Primary Succession: A volcano erupts covering the surrounding area in several feet of ash, New land forms as a lava flow cools, Lichens and mosses forming new soil in an area for the very first time
Secondary Succession: The regrowth of an ecosystem after a flood
Neither: A nuclear meltdown causes the soil to become infertile. It takes many years before the soil is replenished, Grasses and small plants begin to grow from new soil (if the new soil is not part of a primary succession scenario described above)