The correct answer is option 2 - external gills. When a tadpole is newly hatched, it breathes using external gills. These gills are located externally on the body of the tadpole and serve the purpose of extracting oxygen from the water. The gills are responsible for allowing the tadpole to respire and obtain oxygen as it continues to grow and develop. It is important to note that at this stage, the tadpole does not have lungs or internal gills. Lungs are typically developed by organisms that transition from aquatic to terrestrial environments, which occurs later in the frog`s life cycle. Internal gills, on the other hand, are found in certain aquatic organisms, but are not present in newly hatched tadpoles. Therefore, the correct answer is option 2 - external gills.