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:
The Largest Cities in England. London is the largest city in England, followed by Birmingham and Manchester.Mar 20, 2019
Explanation:
london
A large area of flat land, that is at a high altitude is called a plateau. An excellent example of a plateau is Tibet.
