¿te has dispuesto al recordar una mala experiencia o a sentir náuseas al recordar un mal sabor u olor?¿ Por qué crees que sucede esto?​

the youngest layer is 7(middle point) because decomposition must occur in the middle of decomposed materials.the oldest is 12(upper one) because decomposed material are found at the top most of organisms.they are highly decomposed material.they don't decompose easily