Answer: They emphasize the idea that people should fight hard to survive
The solar radiation that heats the Earth's crust is the driving force<span> behind the </span>water cycle<span>. The </span>water cycle<span> is sometimes referred to as the hydro-logic </span>cycle<span> and is a process through which Earth's </span>water<span> continuously moves between the surface of the planet and the atmosphere. </span>
They are similar insofar that they both deal with the theme that without human interference, nature will in the end take over things and have its way with them.
A. I believe hurts has a different tense than the rest of the sentence which makes it not parallel.