Main ideas are basically two words. One main subject and one main verb.
Answer:
Tectonic shift is the movement of the plates that make up Earth's crust. ... The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
Explanation:
Answer:
D
Explanation:
the sentence is personifying the wind by stating that it "sang a lonely song".
