Explain the causes and effects of earthquake. Frequent earthquakes occur in Bhutan. Discuss the reasons for its occurrence.
Discuss the following terms using internet or library resource.
a) Epicenter
b) Focus
c) Seismic wave

they use tree rings to figure out weather patters.

the answer is c i just put d and i got it wrong so yeah its d

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.