Significant settlement in manitoba, saskatchewan, and alberta
a. was a response to the world demand for wheat in the early twentieth century.
b. occurred only after world war ii.
c. occurred only as major highways were built across canada.
d. followed the completion of canada's transcontinental railways

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.