Answer:
Continental drifting
Explanation:
Continental drifting talks about the movement of continents . The process was first discovered by Alfred Wegener. Alfred Wegener noticed the great similarities of the Atlantic coastline of Africa and the south America. He noticed the edge of each continents fits like a puzzle. The idea that the continents were once joined together and have split apart was born out of the observation of the similarities of the continents.
The similarities of fossil found in different continents also proved that the continental has been drifting . The similar fossils found in different continents were better explained if the continents were once joined together. Fossils like the Mesosaurus , a fresh water reptile were found in different continents.
The similarities in rock structure also proved the continents have been drifting .
The answer to this problem is 11 because I did the inverse the inverse of subtraction is addition so I added 7+4 that gave me 11 than I subtracted 11-7 that gave me 4 so x=11
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Igneous rocks are formed when hot molten rock crystallizes. They usually form deep within the earth near active plate boundaries or hot spots that than rise towards the surface .
A declining population poses serious labour deficiency problems in an economy.
It also strains the economy as more and more of the population become dependent. They either depends on social security fund or on their relatives.
Population decline also decreases investments in the countries as it diminshes the market for goods and inhibits new ideas.
