What things did organisms need to adapt to when moving from the sea to land?

Organisms moving to land needed the ability to adapt to a complete new environment. On land there isn’t a constant source of food unless it’s plants so animals had to adapt to eat new foods. Animals also had to be able to stay wet or live without needed to breath water. This led to lungs. Most importantly animals need to be able to move on land which is very hard with aquatic appendages. This led to organisms needed to adapt to climate, terrain, and nutrition source.