<span>The answers are B, the Gobi Desert, C, the Himalayas, and E, the Yellow River. These natural barriers not only hindered expansion and invasion into China from outside sources, but also they maintained an isolated society within the confines of these natural barriers.</span>
Answer:
It suggests that the rapid transfer of plants, animals, and disease may have unknown effects.
Explanation:
In this text, the author tells us that the way plants and animals are transferred globally nowadays is an event that has never been seen before in the history of the world. The author uses this phrase to show how unprecedented this event is. The purpose of showing this is that it suggests that such a transfer might have effects that we cannot imagine or predict.
Germany invaded Poland unprompted, which started WWII.
The federal government has taken a larger role so that makes the answer true
