Which sentence from the excerpt best demonstrates the author’s use of tension?

Select the correct text in the passage.

Journey to the Center of the Earth

by Jules Verne (excerpt)

I turned towards Hans. Hans was at the tiller steering with his usual collected calm.

Nevertheless, if from the distance which separated us from this creature, a distance which must be estimated at not less than a dozen leagues, one could see the column of water spurting from the blow-hole of the great animal, his dimensions must be something preternatural. To fly is, therefore, the course to be suggested by ordinary prudence. But we have not come into that part of the world to be prudent. Such is my uncle's determination.

We, accordingly, continued to advance. The nearer we come, the loftier is the spouting water. What monster can fill himself with such huge volumes of water, and then unceasingly spout them out in such lofty jets?