A felsic extrusive igneous rock is formed from

silica-rich lava at Earth’s surface

basaltic lava at Earth’s surface

silica-rich magma within the Earth

basaltic magma within the Earth

A felsic executive igneous rock is formed from Basaltic rava at Earth surface.

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.