Soil erosion is a problem for farmers because:

Soil erosion can lead to all kinds of problems for farmers everywhere, including a loss of the topsoil, soil compaction, drainage problems, high soil acidity levels, water pollution and fewer organic and fertile materials in the soil, just to name a few

Explanation:

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.