Because they make you seem confident
Any coastal area has the potential to be struck by a tsunami but out of the options you provided Alaska is definitely at most risk.
This is because Alaska is facing what scientists call a megathrust (subduction zones) in which almost three quarters of all tsunamis tend to occur.
Fun Fact: The largest tsunami ever recorded was in Alaska with waves reaching a whopping 1720 feet high (524 meters)!
They ducked under the trestle which made Helen lose her balance and fall in the water.
Every gerund has the same form - verb + -ing. So, having that in mind, the word <em>sleeping </em>is used as a gerund in this sentence, but it is also a subject of the sentence.
