Which sector would farming fall under?

Which sector would designing a new iPhone for Apple fall under?

Which sector would selling that iPhone to a customer fall under?

Which sector would making a T-shirt out of cotton someone farmed fall under?

When a country's economy moves from mostly primary sector to the secondary sector, this is known as...

When an economy moves from manufacturing to the service industry this is known as...

Which economic system is defined by citizens owning businesses and little government interference?

Which economic system is defined by the government owning some industries in order to provide services such as healthcare and education?

Which economic system is defined by the government owning all industries?

What does the "Rust Belt" refer to?