Jack has harvested a cereal crop. Without using fertilizer, how can he increase the field's soil fertility?

A. cultivate corn or oats

B. cultivate any leguminous plant

C. cultivate any kind of grass

D. keep the soil waterlogged

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.

Ithink you should go back and learn in school rather then here asking questions