What is the frequency of initial disturbance in primary succession and in secondary succession? also what is the severity of initial disturbance in the both.

Secondary succession Secondary succession follows a major disturbance, such as a fire or a flood. The stages of secondary succession are similar to those of primary succession; however, primary succession always begins on a barren surface, whereas secondary succession begins in environments that already possess soil Secondary succession Secondary succession follows a major disturbance, such as a fire or a flood. The stages of secondary succession are similar to those of primary succession; however, primary succession always begins on a barren surface, whereas secondary succession begins in environments that already possess soil.

Explanation:

the answer is d (apex) good luck : ))