Shells protect snails against predators. therefore, snails with thick shells are favored over those with thin shells through

b. to discover aspects of the natural world.

hopefully i .

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .