2.) Rotate
Revolving refers to something that is going around something else. Rotating refers to something that is spinning in circles(typically around an axis) by itself.
3.) "The tilt of the Earth's rotation axis provides conditions for its climate to be suitable for life. By altering what portions of the Earth get the majority of incoming sunlight, no region on Earth is allowed to heat to extreme temperatures"(energyeducation.ca)
4.) I'd assume that there are more hours of daylight if Sydney is facing towards the sun. I'm not particularly sure why though. ¯\_(⊙_ʖ⊙)_/¯
Answer:
"Castro's relationship with Khrushchev appeared to be a threat to America's safety.
Kennedy attempted to create alliances with Cuba in order to overthrow the Soviet Union. "
Answer: The correct answer is "Voluntourism is a worthwhile way to make a difference and travel the world.
Explanation: The claim throughout the article is that while those who "voluntour" think they are making a difference by their efforts, there are a wealth of problems that occur because of their presence. The essence of the article (or claim) is that "voluntourism" is not really a good thing. Thus, the counterclaim is the choice listed.