Acharge apresenta um momento da conversa de um casal. com base nesse diálogo, explique qual tema provável da conversa entre as personagens

What is the present participle from of prove

Which of the following statements is true? minerals can be solids or liquids. minerals must have a homogeneous chemical composition. evaporites are a type of metamorphic rock. contact metamorphism is caused by large-scale geological events.

But we pulled at the grill [on the ground] and it gave way. and then we saw iron rings as steps leading down a shaft into a darkness without bottom. … it was a great tunnel. its walls were hard and smooth to the touch; it felt like stone, but it was not stone. on the ground there were long thin tracks of iron, but it was not iron; it felt smooth and cold as glass. we knelt, and we crawled forward, our hand groping along the iron line to see where it would lead. but there was an unbroken night ahead. what is the most likely explanation for the walls described in the bold text?