Answer:
Simple
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YES the Puerto Rican law violated the dormant commerce clause. Puerto Rico does not have the power to regulate the cement labels because this law concerns commerce (and the US has the power to regulate commerce within the US territories and abroad).
Answer:
- "early ripening rice"
- new irrigation techniques and systems
- planting new crops (cotton, tea)
Explanation:
Song Dynasty was a famous Chinese dinasty ruling from 10th till 13th century.
Among other things, this period is famous for massive agricultural improvements which increased crop production. Subsequently, that led to the increase in China's population.
Probably the most famous improvement was the development and use of "early ripening rice". This rice had a shorter life cycle which meant that it could grow 2 - 3 times per year, making more crops.
Also, new irrigation systems and techniques were invented which allowed the crops to be watered more efficiently and preventing drought.
We must not forget that China started farming other crops at that time including tea and cotton.
All of this improved farming making it one of the most notable legacy of the Song Dynasty.
Epistolary form is the art of moving the story forward with letters. Novels written in this form usually incorporate "letters" between characters that show what the story is like. It needs not necessarily be letters and can include news paper articles or similar. An example of such a novel would be Bram Stoker's Dracula.
