All 3 Uses of

preserve
in
All Quiet on the Western Front

"I am going to get up a little to-day," she says and turns to my sister, who is continually running to the kitchen to watch that the food does not burn: "And put out that jar of preserved whortleberries—you like that, don't you?" she asks me.
p. 159.2 *

preserved = prepared in a way that keeps them from spoiling (and with lots of sugar, kind of like jam)

I want to think myself back into that time. It is still in the room, I feel it at once, the walls have preserved it.
p. 170.9 *

preserved = kept it as it was

As in a polar expedition, every expression of life must serve only the preservation of existence, and is absolutely focused on that.
p. 273.5

preservation = protection

Definitions:

(1) (preserve as in: preserve the records)
to protect something or to keep it as it is
(2) (preserve as in: preserve the peaches)
to prepare food in a way that keeps it from spoiling
(3) (preserve as in: a wildlife preserve)
protected wildlife area
(4) (preserve as in: no longer a male preserve)
something exclusive to (someone or some group) -- such as an activity or place
(5) (preserves as in: mom made preserves)
chunks of fruit cooked with sugar (like jam) and sealed (usually in a mason jar) so it will not spoil