Question

the ______________ is the body system that transports oxygen, nutrients, and waste through the body.
options: circulatory system, immune system, respiratory system, digestive system

Explanation:

To solve this, we analyze each system:

• Circulatory system: Transports oxygen, nutrients, and waste (via blood).
• Immune system: Fights infections, not transport.
• Respiratory system: Exchanges gases (O₂/CO₂), not general transport.
• Digestive system: Breaks down food, absorbs nutrients (not all transport).

So the circulatory system matches the description.

Answer:

A. circulatory system