Lava that cools quickly forms

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

at right angles to each other

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.