Answer:
independent variables is tempuature
dependant solubility of salt
The form of the verb plan in the sentence is active. Thus, the answer to this item is letter A. An active verb is when the subject is the clearly the "doer" of the action. From the sentence, the subject is I and is clearly the doer of the action which is planning.
The best answer is "powerless and depressed". Words like "cough", "choke", "old", and "finally" convey a sad mood, which rules out "angry and vengeful" and "indifferent". The girl is clearly frightened and sad, without any say in the current matters, which makes the best answer "powerless and depressed".
Switch the last two and then everything should be correct!
