Igneous rocks are formed through the cooling of magma or lava.
The main types of rocks are: igneous, sedimentary, and metamorphic.
Answer:
I think the answer is not building towns near the edge of a tectonic plate?
Explanation:
Hope this helps!! :)
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.
Tides are caused by the location of the earth, sun and moon.
