Question

i looked back and saw the three cars all climbing, spaced by the interval of their dust. source: a farewell to arms in this sentence, interval means: the distance between things a heap or pile the act of contaminating or polluting a sudden or mysterious disappearance

Explanation:

In the context of the sentence, "spaced by the interval of their dust" implies the distance between the cars. The other options do not fit the context.

Answer:

the distance between things