How might annual fires affect the succession of a temperate deciduous forest

Which of the following is not a potential result of deforestation?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

What is a population? a. all the members of the same species living in the same ecosystem at the same time b. the number of a species living in the same ecosystem over a period of time c. the total number of organisms living in an ecosystem at a point in time d. all the members of a food web in the same ecosystem