Why is figure 3 more helpful than figure 2?

Figure 3 is more helpful than figure 2 since it shows a clearer trend in the data, while figure 2 does not.

Explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs