Explanation:

- Primary Sector: This involves natural resources extraction and agriculture. It includes farming, fishing, forestry, and mining activities.

- Secondary Sector: This includes manufacturing and industry. It turns raw materials from the primary sector into finished goods, such as cars, clothes, and electronics.

- Tertiary Sector: This involves services rather than goods. It includes sectors such as retail, entertainment, finance, healthcare, and education.

- All of these: An economy typically includes all three sectors, as each plays a crucial role in development and contributes differently to the economy's structure and workforce.

Your answer is right.