Behavioral Perspectives on the Neuroscience of Drug Addiction.
To facilitate in naval navigation, the Han Dynasty invented the B. magnetic compass
Explanation:
The magnetic compass is one of the most important inventions of the ancient era which was achieved by the Han dynasty during their rule as they were trying to come up with ways for better naval networking for trade routes.
The Han dynasty was one of the greatest innovators of the ancient world with their great inventions ranging from Paper and the wheelbarrow to the magnetic compass. These great inventions often helped them establish the silk route and become a major point of trade on the globe.
A group of powerful leaders
Answer:
Possibly because it feeds their young with milk. This is a common practice that mammals do.
Explanation:
Subject had positve reinforcement rather negative
