As succession proceeds in an ecosystem, there is an increase in population density. This is accompanied by what other change?

Answer: B.
Explanation: Ecological succession, quite literally, is the change in the species of an area/ecosystem that had earlier been completely wiped out. Wildfires are a prime example of that.
Answer: B increase in species diversity :)
Explanation: Succession causes new species special to the area to grow and prosper in the right conditions.