From lowest to highest? Supreme Court is the highest
The answer is option D "a document made by someone who actually saw an event." A primary source would be like a witness during a event. They can give reliable information on what happened during that event. Main primary sources are: documents, pictures or photographs, and objects that can explain what happened during a event.
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It would be the "Western Ghats" that prevents moisture from the summer monsoon winds from reaching the interior of the subcontinent, since its positioning is such that any excess winds are diverted.
Investment (and NO stock has a guaranteed return).