Consider the group of giraffes in the image below. Mc006-1. Jpg which statement about the giraffes explains their evolution based on charles darwin’s main points? the closest fossil ancestor to these giraffes would have a very short neck. All three of the giraffes have an equal chance of reproducing regardless of the environment. As a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment. Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.