The answer is folded mountains.
As she pushed two pancakes together, this indicate the motion of plate materials being pushed towards each other under compressional force, which would then cause the crust to be uplifted and start to buckle and creases under the force. Therefore it is fold mountain that she was modelling.
Let's also look into the other answers:
Volcanic mountains
- Although the mountains formed under compressional force can possibly be a volcanic mountain depending on the magma movement under its crust, the modelling of pancake cannot indicate the movement of magma or represent any signs that it is an volcanic mountain with volcanic activity. Thus this is false.
Tilted fault block mountains
/lifted fault block mountains
-Block mountains are formed under tensional stress where the two plate materials are being pulled apart and caused faulting, some rock materials will fall while causing some to be uplifted. These uplifted mountains are called block mountains. These options are therefore incorrect.
Hope it helps!
Should've put this in mathematics, you know? But don't worry, mistakes happen!
Though, in order to do this problem, we need to add 20 for the total gallon.
Let's use X for a placeholder to determine the amount, as the gallon of 25% alcohol and percentages can be in decimal forms. It'd be 0.25x gallons worth of alcohol afterwards. We then add 20-x gallons to 5% of alcohol, which is 0.05(20-x).
This would then allow us to find the sum of 20 gallons to 20% of alcohol, containing at least 0.2(20) gallons of the alcohol.
We'd then be able to develop this equation;
0.25x + 0.05(20-x) = 0.2(20).
And then so on the sequence continues...
0.25x + 1 - 0.05x = 4
0.2x = 3
x = 3/0.2
We'd then be able to come to a conclusion that;
1. X equals 15 gallons of 25% alcohol
2. 20-x equals 5 gallons of 5% alcohol.
They have evolved to endure more as well as having been exposed to it from birth.
The answer is the Cold War as the world was divided between the Warsaw pact of the east and NATO of the West.
