Which statement best describes arteries?

They have thin walls and transport blood away from the heart
They have thick walls and transport blood toward the heart
They have thin walls and transport blood toward the heart
They have thick walls and transport blood away from the heart

The correct answer is: Arteries have thick walls and transport blood away from the heart.

Arteries are blood vessels that carry oxygen-rich blood away from the heart to the rest of the body. They have thick walls to withstand the pressure of the blood being pumped by the heart.

The other options are incorrect. Option A is incorrect because arteries have thick walls, not thin walls. Option B is incorrect because arteries transport blood away from the heart, not toward the heart. Option C is incorrect because arteries transport oxygen-rich blood, not oxygen-poor blood.