Ravi makes loaves of bread using wheat flour and corn flour .he uses 0.35 kg of wheat flour to make each loaf of bread . if he uses a combined total of 1.52 kg of flour to make 2 loaves , how much corn flour is used in each loaf

the correct answer is the last option

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.