The correct answer is: Turtle X breaks nuts and digs for food on the ground; and Turtle Y reaches for food higher up on bushes and trees.
Different size and shape of turtle beaks is usually a consequence of different environmental factors. The same thing is with their necks. Those structures are adapted for feeding (e.g. for different kinds of seeds), so turtle with long necks can reach food on higher trees, while those with short necks feed on the ground. Hard, sharp beak can break hard nuts.
