What is manifest Destiny?

A belief that during the 19th and early 20th centuries that America was destined by god to spread west and cover the entire continent. This belief led to many wars eventually giving the U.S control over the Philippines and Puerto Rico.

Explanation:

I'm in AP US history.

was a widely held cultural belief in the 19th-century United States that American settlers were destined to expand across North America.

Explanation:

The correct answer is a conversation that annoys people nearby

A negative externality is a thing that affects a third party negatively. In this case, the inability to use in a tunnel, the size, and the need for charging, don't affect third parties. They affect you as the consumer, or the company that produced it. Annoying nearby people would affect a third party not participating in your relationship with the company that provided you with the phone.