Which revision fixes the dangling modifier in the sentence?
rowing through the rapids, the canoe began to fill with water.

the canoe began to fill with water when rowing through the rapids.

the canoe began to fill with water, rowing through the rapids.

when rowing through the rapids, the canoe began to fill with water.

when we were rowing through the rapids, the canoe began to fill with water.

The revision that fixes the dangling modifier in the sentence is the last option:
When we were rowing through the rapids, the canoe began to fill with water.

A dangling modifier is called that way because we don't exactly know what it refers to. The way it is written, the first sentence would mean that the canoe was rowing, and not the people inside of it.

An inference that can be made is that the princess is bothered about the tiger door. although there are reasons for both this one has a better reason. the princess is not a monster and even if she didn't want to marry this man she wouldn't want him to die. the grudge of death is pretty heavy. unless she has done this before and feels no regret then she wouldn't want to be married to someone of low quality, if he is low quality.