Its actually C. hot and sunny. We are talking about tropical continental. The other answer the user put D. does not make sense when talking about a tropical area. The overall answer is C.
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.
Because hot air is less heavy cold air is more heavy causing them to shift if cold air is placed on top.
Tibet is the world's highest plateau.
It would be C. Burning coal contributes to warmer global temperatures
