The correct sequence among the given options that represents the evolution of living organisms is Option 3: Salamander - Python - Kangaroo.

Option 1: Octopus - Dolphin - Shark

This sequence does not represent the evolutionary order of these organisms. Dolphins and sharks belong to the class of fish, while octopuses belong to the class of cephalopods. Dolphins and sharks share a common ancestor with bony fish, while cephalopods, including octopuses, have a separate evolutionary lineage.

Option 2: Pangolin — Tortoise — Hawk

Again, this sequence does not represent the correct evolutionary order. Pangolins belong to the order Pholidota, tortoises belong to the order Testudines, and hawks belong to the order Falconiformes. These organisms have different evolutionary histories and are not directly related to each other.

Option 3: Salamander - Python — Kangaroo

This sequence represents a more accurate order of evolution. Salamanders are amphibians belonging to the order Urodela, pythons are snakes belonging to the family Pythonidae, and kangaroos are marsupials belonging to the family Macropodidae. In terms of evolutionary history, amphibians (like salamanders) evolved earlier than reptiles (like pythons), and reptiles evolved earlier than mammals (like kangaroos). This sequence aligns with the principle of common ancestry and the geological time scale.

Option 4: Frog - Crab - Prawn

This sequence does not accurately represent the evolutionary order either. Frogs are amphibians, crabs are crustaceans, and prawns are also crustaceans. While amphibians and crustaceans both belong to the broader group of invertebrates, they have different evolutionary paths. Amphibians evolved earlier than crustaceans, so the order should be different.

In conclusion, Option 3: Salamander - Python - Kangaroo represents a more accurate sequence in terms of the evolutionary history of these organisms.