B. Better managing our natural resources
I think the answer is B: sediments melt deep beneath the Earth's surface.
They should study about how volcanoes erupt or explodes
Answer:
A regional or social variety of a language distinguished by pronunciation, grammar, or vocabulary, especially a variety of speech differing from the standard literary language or speech pattern of the culture in which it exists.
or
A variety of language that with other varieties constitutes a single language of which no single variety is standard.
Hope this helps :)
A. This is because these formations occur on the surface and can range from mountains to forests.