They are can be except for wind weathering i believe. That is caused by the wind.
Ocean trenches are created by the moving apart of tectonic plates, volcanoes are pushed to erupt by the movement of tectonic plates and earthquakes are cause by the movement also.
Answer:
A/D would be the best answers.
Explanation:
The ethnic groups are not proportionately represented. Instead of a federal system the government has always been a unitary one.
What you're looking for in here is the hardness: a material can scratch another material if it's harder than it.
So the desired material cannot be harder than amphibole, which has a hardness of 6.
But it has to be harder than fluorite, which has a hardness of 4.
So we're looking for a hardness of between 4 and 6 and from the table we see it's magnesite (we'll need a hard magesite) - this is the correct answer!
