Question

She has her property to fall back ------ in her old age ( Use Preposition)
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Answer 1

Answer:

in is the preposition

Explanation:

i hope it's helpful

Answer 2

She has her property to fall back in her old age.

EK:-

A preposition is a word or group of words used before a noun, pronoun, or noun phrase to show direction, time, place, location, spatial relationships, or to introduce an object. Some examples of prepositions are words like "in," "at," "on," "of," and "to." Prepositions in English are highly idiomatic.