Over several years, a population of bats that inhabits a cave decreases. Which of the following factors could cause this decrease in bat population size to occur? Choose all the factors that apply. A. decrease in predators
B. competition for shelter
C. increase in food supply
D. infection by a fatal disease

Competition for shelter

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.