The primary function of the human male
reproductive system is to
(1) provide a site for fertilization
(2) produce and transport gametes
(3) protect and nourish the embryo
(4) prevent urine from leaving the body

(2) produce and transport gametes is your answer, to the site provided for fertilization and nourishing the embryo. But it does NOT prevent urine from leaving the body, or if its supposed to, does a poor job of it.

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.