Answer:
D. Zimbabwe
Explanation:
Dahil hindi siya nabibilang sa kanlurang Africa
The right answer is vein (it contains blood and has valves).
The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.
I think you might've forgotten something. There is no labels, pictures, or any options. Add some more stuff and I'd be able to help out.
The CNS involves the brain and spinal cord and the PNS involves the body nerves.
