Answer:
Technological innovations increased agricultural yields.
Explanation:
The Chinese economy in the period 1200-1450 increased due to higher production of agricultural crops with the use of new technologies. In the period of song dynasty, an early growing rice cultivar was produced which can be grown multiple times in a year. Due to multiple harvest, food was available in large amount for the people so we can say that innovations increase the yield of crops.
Well..as far as i learned from my knowledge the answer would be in the past, the military and the FBI have prevented a number of terrorist attacks.
Secondly, wasn't there suppose to be an option answers for your question ?
bruh k12 i just on a quiz Vladimir
Answer: No other European power had established a presence in the area.
In the early 19th century, Russia had already established some colonies in Alaska, securing its presence in America. Russia was expanding East, across Siberia, and eventually started moving south, until it reached Northern California.
Americans who were involved in the sea otter business proposed some joint hunting expeditions with Russian supervisors and Native Alaskan hunters to hunt seals along the Californian coast. These expeditions allowed the Russian parties to observe large stretches of uncolonized land. This led to the conclusion that a Russian settlement could be established in California.
