The principle vied the students to accomplish their work.
From my understanding all you are doing is converting liters to grams. It says you have one leader of hydrogen peroxide. 1 liter equals 1000 grams. And if it is asking how many grams are in 1 liter hydrogen peroxide then the answer would be 1000 grams
Theme as a literary device presents the topic or main idea of the text, this is normale presented as a single word.
Setting helps us identify the surroundings, time, place and even emotions in a text.
Irony is the contrast between what's expected to be and what it really is.
Allusion makes reference to something or someone that it's easily recognized or known
Taking this in consideration the excerpt "She could see in the open square before her house the tops of trees that were all aquiver with the new spring life." uses Setting as a literary device.
You didn't provide the responses, but upon further investigation, the answer is B, "It is not a pretty sight."