Because of the river gave them advantage to spread and conquer.
Step by step:
Challenging behavior is the correct answer.
Challenging behavior is defined as any behavior that interferes with children's learning, development and successful play. This type of behavior affects not only the kid who is presenting this behavior but the other kids and adults around him/her. Unfortunately, if this behavior is not dealt with, it will put the child at high-risk, school and social failures later on since it limits the kid's ability to learn and grow.
Answer:
A.
Explanation
Kublai Khan contributed to the fast growth of China's economy by reopening and enhancing trade routes. He reformed China's political structure to have a closed social hierarchy. His dynasty, the Yuan Dynasty (1271-1368), led to the development of Chinese literature and architectural style.
PTSD, or post-traumatic-stress-disorder. After experiencing the trauma of being trapped in an elevator, this is her brain's way of reminding her of the previous danger she faced even if there is no danger present at that time.
