Which of the following is the best definition of Genetics?
a. The passing of traits from parents to offspring
b. A child can get different forms of a trait from their parents
c. The study of how traits are inherited through the interaction of alleles
d. The study of how one trait can pass down through the generations

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.