The correct answer is A. silica.
The amount of silica found in the magma determines the viscosity. The higher the silica in magma, the higher the viscosity of a magma. So the correct answer is silica. It is not among the other choices.
Answer:
clumped distribution, because you'de have all of the population gathered in a relatively small are.
it's the most common because it provides protection and a mate for reproduction
example: humans, seeweed, cattles, etc.
Answer:
Italy
Explanation: Since Italy's Total GDP is $2,118 and all the other countries are lower that shows that they are most developed. Also if you look at the GDP per Capita it is greater than the other countries. This means that Italy has the highest GDP and GDP per capita. Because of these two things Italy is the most developed.
Answer:
basic economic and demographic problems which chinery would further add to the output which could be these underdeveloped countries have had.