I don't know what the original sentences looked like, but I assume the answer is :
C) That ancient land was located in the Middle East, a hot and sunny part of the world.
D) To restate the thesis and summarize the final point.
Thank you for your question!
Compound word.
Don't mind the "x" and "z" if you look at the included image.
This might help. It is the image.
http://www.enchantedlearning.com/alphabet/wordforeachletter/compoundwords/answerstiny.GIF
Radiation is the transfer of energy through electromagnetic waves. for example, infrared radiation travels towards you, and gives its energy to the molecules in your body, warming you up.