Question

1. what has helped change scientific ideas of the hadean eon?

new research and computer - generated climate models
new discoveries of minerals in moon rocks
discovery of the zircon crystals in australia

Explanation:

The Hadean eon is Earth's earliest geologic eon, with limited direct rock records. Zircon crystals from Australia (e.g., the Jack Hills zircons, ~4.4 billion years old) are among the oldest known terrestrial materials. They provided evidence of liquid water and crust formation during the Hadean, challenging previous ideas of a completely molten, hellish early Earth. While new research/models and moon rock minerals contribute, the zircon discovery was a key game-changer for revising Hadean scientific ideas.

Answer:

discovery of the zircon crystals in Australia