Read the sentence. After traversing the trail to the mountain summit, Susanna was famished and in dire need of sustenance food before she could venture back down. What is wrong with how the word sustenance is used in the sentence? Sustenance is used as an adjective, but it is a verb. Sustenance should have a comma after it to separate it from the last clause. Sustenance is used as an adjective, but it is a noun. Sustenance should have a hyphen after it to connect it to the word food.