Which animal is Venomous apoison dart frog or scorpion or African toad?

The poison dart frog is the most venomous among the three, as it secretes potent toxins through its skin that can be lethal to predators. While scorpions possess venom used to subdue prey and defend themselves, their venom is generally less harmful to humans compared to that of the poison dart frog. The African toad, while it can secrete toxins, is not considered truly venomous in the same sense as the other two. Thus, the poison dart frog is the most venomous of the three.