Final answer:
The giant images on the ground discovered in the Nazca Plateau are shapes of plants and animals called the Nazca Lines, created by the Nazca people. These images were made by clearing stones away from the desert floor to reveal the different-colored ground beneath, forming geometric patterns and representations of animals like birds, fish, lizards, and cats.
Step-by-step explanation:
The giant images on the ground discovered when planes began flying above the Nazca Plateau in the 1920s are shapes of plants and animals. The Nazca people created these massive images, known as the Nazca Lines, between 200 BCE and 600 CE. The images were made by clearing stones away from the desert floor to reveal the different-colored ground beneath, forming geometric patterns and representations of animals like birds, fish, lizards, and cats.