Answer:
Jellyfish, reptiles, mammals.
Step-by-step explanation:
Evolutionary history follows a pattern of increasing complexity and specialization. Jellyfish, as simple invertebrates, appeared early in evolutionary history. Reptiles, including dinosaurs, were the dominant land animals for a significant period. Mammals evolved later, branching off from reptilian ancestors. This order aligns with the progression from simpler organisms to more complex ones.