What challenges have Argentina, Peru, and Chile all faced? A
Leadership has changed frequently.

B
Brazil threatened war.

C
Populations have been decreasing.

D
Exports have been few.

answer; gravity pulls glaciers down hill and as glaciers flow it pick up rocks and soil;

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.

answer conditional instability;

italy:

classic, nostalgic, romantic and beautiful. no place better than italy or sicily.