Where they live?
Like you know the turtles live in water and the tortoises live in the ground. In these two photos you can see the type of the surface, and you know the differences.
Turtles have the caparison with a form that have the necessary dinamic to swim in the sea and the tortoises have a diferent form of caparision. The caparison of tortoises are more resistent and more
The surface in this two animals is very important because they can develop his life. The turtles and tortoises in the stage of reproduction always they put his eggs in the sand or land. Also we can observe that all the food or preys live in their respectives surfaces.
In conclusion, the surfaces that they live are very important. The food, the form of they caparision, the reproducion... but you have to remember that they put their eggs under the land or sand. Out of the water.