Major Monsters of Greek Mythology

Which of the following monsters is known as a multi-headed dog guarding the underworld in Greek mythology?

Which primordial monster is described as the father of many later monsters and was defeated by Zeus after a titanic battle?

Which of the following creatures is described as a multi-headed water-serpent whose heads regenerate, and was a challenge for Heracles?

Select all the creatures that are associated with Heracles' labors.

Which monster from Greek mythology is described as half-man, half-bull and kept in the Labyrinth on Crete?

Which of the following are considered riddle-makers or sirens in Greek mythology?

Which of the following monsters is described as a colossal storm monster and father of many other monsters in Greek mythology?