Lamarck & Darwin did wrong think about giraffes

Lamarck asked himself: Why do giraffes have been taller over time? And he achieves a wrong answer also. The bad question directed him to the wrong answer. Darwin asked himself: Why do giraffes have been taller over time? And he achieve a wrong answer also. The bad question directed him to the wrong answer. I asked myself: Why all of mammals have been larger within a period of their life? Why all classes of land vertebrates (amphibians, reptiles, crocodiles, birds, mammals) have been larger within a period of their life? Why all classes of vertebrate, invertebrate, arthropods and plants have been larger within a period of their life? And I found a correct answer. The right and proper question directed me to the correct answer.