[2026] PTE Academic Reading - Re-order paragraphs

Light Detection and Ranging, or LiDAR, has recently emerged as a transformative tool for the field of landscape archaeology.

This technology works by emitting rapid laser pulses from an aircraft and measuring the time it takes for them to reflect off the ground.

By filtering out the return signals from dense forest canopies, researchers can create highly accurate digital maps of the underlying terrain.

Such detailed imaging has already led to the discovery of sprawling, hidden ruins in regions like the Amazon and Central America.

Ultimately, this non-invasive method is revolutionizing our understanding of ancient civilizations without the need for extensive physical excavation.