Answer:
D. physical boundary
Explanation:
Google the himalayas as borders in south east asian countries, you'll clearly see that they exist as physical boundaries between nations such as Nepal and China.
Answer:
Social problems are usually present constantly, making it difficult to mark change.
Explanation:
Simply put, a social problem is any condition which affects a large number of people and is usually negative.
Therefore, the BEST Explanation as to why it can be harder to have an issue that impacts those in the lower realms of society defined as a social problem is that social problems are usually present constantly, making it difficult to mark change.
Answer:
1st many people died and it was even contagious like the black pledge so people wear mask people had to quarantine to spread by people traveling alot.
