How does the physical environment affect human activity and settlement in east asia? 14 points choose all answers that are correct. a) the harsh climate of mongolia causes the area to be sparsely populated. b)the fishing industry is important to the economy of the peninsula and island countries but not to china. c) the hot and rainy areas of the plateau of tibet allow rice farming. d)the people of the peninsula and island countries have a moderate climate to grow their crops.