Adaptive radiation refers to the rapid rate of diversification of a species into a multitude of new forms, depending on the existing favourable environmental conditions.
On the other hand, phyletic gradualism refers to the model of evolution theory where diversification is slow, uniform and gradual. This happens through a process called anagenesis, where whole species transform into a new one.
Lastly, punctuated equilibrium is a hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change.
Therefore, the answer for this question, the mode of evolution is adaptive radiation.