You are on vacation in the canadian rocky mountains and you observe that a massive forest fire has burned all the trees off the side of the mountain and sterilized the soil, leaving no topsoil. the type of succession that occurs following this type of fire is

Secondary Succession

Explanation:

A secondary succession is usually defined as a type of ecological succession, where the new floras and faunas are resettled after the occurrence of flood, forest fire, earthquake or any other disaster that destroys the previously existed ecosystem.

This type of succession is possible to occur because the essential nutrients that are required for the survival of organisms occurring in a particular area are not completely destroyed.  

The secondary succession takes place at a much faster rate compared to the primary succession.

Thus, in the given condition, the secondary succession will occur after the occurrence of a massive forest fire.

the answer is c i just put d and i got it wrong so yeah its d