Which statement best explains Lamarcks theory of acquired characteristics as it relates to the neck length of giraffe

There are no choices available but, based on the theory mentioned in the question, giraffes developed long necks because the food that they primarily consumed also evolved or has grown through time. The need to feed and survived probably led the giraffes DNA to decode and adapt within its surroundings, hence making giraffes have long necks that precedes the evolution of the plant that they eat.