How were the Romans able to move from wooden houses to more permanent structures?

The correct answer to this open question is the following.

Although there are no options provided, we can say the following.

Romans were able to move from wooden houses to more permanent structures because they started to experiment with the use of concrete, cement, and better formulas to increase the quality of this material. Romans were also capable of exploring new ideas to create forms such as vaults and arches. Let's have in mind that Romans originally used a different material called "tufa" which was a volcanic rock. A solid material but not an aesthetical one. Years later, Romans cold mix concrete with volcanic sand to create a more resistant material. With the use of marble, Romans were capable of creating marvelous buildings and temples.

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.

it is a : ) always outside of government control