What led to the complication of the structure of the brain of amphibians?

Amphibians, like fish, have five divisions in the brain. Due to the lower motor activity, the cerebellum in amphibians is smaller in size than in fish. However, the forebrain is much better developed. It is large in size and divided into two hemispheres. The centers located in it carry out nervous control, analysis and comparison of the work of the organs of smell, sight, hearing, as well as skin and muscles. Thanks to this organization of the forebrain, the behavior of amphibians has become more complex. The development and complication of the forebrain is the adaptation of amphibians to life in a more complex, changeable and diverse environment, such as the terrestrial environment.

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