Perubahan terjadi akibat adanya suatu pengalaman atau latihan. Berbeda dengan perubahan serta-merta akibat refleks atau perilaku yang hanya bersifat naluriah. the process by which an individual usually takes substance into their intellect through the natural environment, which may mean switching the proof in their senses to make it fit” dan https://watsan.org/tugas/31745979