What feature is lost as animals move more fully to land?Group of answer choicesGillsHairLegsSymmetry

When animals transitioned from an aquatic environment to a terrestrial one, they lost the ability to use gills. Gills are specialized organs that allow for the extraction of oxygen from water, which is not necessary in land-dwelling animals that rely on lungs or other respiratory methods to breathe air.

To elaborate, gills are effective in water, where oxygen is available in dissolved form, but as animals adapted to land, they evolved lungs or other respiratory systems suitable for extracting oxygen from the air. The shift in locomotion and habitat also necessitated other adaptations, such as the development of limbs instead of fins for movement on land.

Thus, during this transition, the notable feature that was lost is:

• Gills.