The Galapagos Islands are home to variations of tortoises. The shapes of their shells are the most noticeable variation. The tortoise population on Isabela Island exhibits mostly dome shaped shells, but Hood Island has a large population of tortoises with the saddleback shells. A shell that is a hybrid between the dome and saddleback shells is exhibited on Pinta Island WHAT MIGHT BE SOME EXPLANATIONS FOR THE VARIATION IN SHELL?

The light is great source of energy

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.

The answer is reflection.