Explain how Lamarck's theory of evolution would differ regarding the evolution trend in elephants

Lamarck's theory of evolution differs from Darwin's in its premise that adaptations appear when needed in response to the environment and the acquired traits are then passed on to offspring. Genetic research, however, has shown that living organisms cannot alter their genetic material as needed. Darwin's theory differs from Lamarck's by describing evolution as a consequence of the environment instead of a response to it