Ideas are a) the way words and phrases ae used to tell the story
b) the descriptive words and phrases that make the writing interesting
c) the key elements of the story and details that support them
d) the way sentences are written and flow together to tell the story

Faith is right it is C.  the key elements of the story and details that support them

Explanation:

in night, why are wiesel and his father evacuated from the auschwitz concentration camp? a massive escape makes the nazis question the security of auschwitz. they are assigned to work as laborers in a factory at another camp, buna. hitler has ordered that all remaining jews be relocated within german borders. the german army needs the camp guards to go to the battle front for a last-chance defense.