Final answer:
The stage of succession taking place in the forest is secondary succession, where certain plant species colonize the forest after it was completely destroyed by a volcanic eruption.
Step-by-step explanation:
The stage of succession that is taking place in the forest is secondary succession.
This occurs in a formerly inhabited area that was disturbed, such as by a fire or flood. In this case, the forest was completely destroyed by a volcanic eruption, which is a type of disturbance. After the disturbance, certain plant species called pioneer species started growing in the forest. These species are able to survive the harsh conditions and also facilitate the growth of other species, leading to the gradual recolonization of the forest.
Secondary succession is faster compared to primary succession because the soil is already in place. It involves the sequential appearance and disappearance of species in a community over time, ultimately leading to the establishment of a stable climax community.