There is really nothing to know. All you have to use is context clues and common sense. We know some synonyms for direct are manage and handle. Indirect means not direct, right? And we can't handle or manage earth's interior (core), right? Therefore, the study of earth's interior is an example of indirect observation because we cannot directly manage it.
Answer:
Russia and Brazil have the largest area of boreal forests but Russia has the most area out all countries.
Explanation:
~Hello there!
Your question: Which climate type normally has the largest annual range in temperature?
Your answer: Subpolar climates is the type of climate that normally has the largest annual range in temperature.
Any questions ^?
Happy Studying!
Wikipedia says that the largest major plate is the Pacific, and that the smallest minor plate is Juan de Fuca. So that must be the correct answer after all.