I'm really lost..
recently, some crop plants were genetically modified to be immune to the effects of weed killers. which of the environmental concerns should be considered before planting the resistant crops?

a increase in crop diversity

a decrease in crop diversity.

a increase in crop yield.

a decrease in crop yield.

The environmental concern that should be considered before planting resistant crops is an increase in crop diversity. The correct answer is A. 

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.