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the answer would be
A. an unusual event splitting a habitat, such as a severe hurricane 

The event which do not trigger adaptive radiation is the unusual event splitting a habitat, such as a severe hurricane

What is adaptive radiation?

Adaptive radiation, is the comparatively paced organic evolution of several species from a common ancestor.

The improvement of mammals after the extinctions of dinosaurs is a type of adaptive radiation.

The following events can trigger an adaptive radiation except-

  • Extrinsic factors-The extrinsic factors trigger an adaptive radiation by rising the new ecological possibleness due to the change in environment.
  • Intrinsic factors-The intrinsic factors trigger an adaptive radiation by changes in the often being related with key innovation.

From the given, options, the unusual event splitting a habitat, such as a severe hurricane do not trigger the adaptive radiation.

Hence, the event which do not trigger adaptive radiation is the unusual event splitting a habitat, such as a severe hurricane

Learn more about the adaptive radiation here;

https://brainly.com/question/324455

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