Which word in the sentence is the indirect object?

My father taught us the value of saving money.

a. money

b. taught

c. us

d. value

The answer is c. us

To put it simply, indirect objects are words or phrases that told us to whom or whom a verb/activity is being done.

on the question above, "My father taught us the value of saving money"

The verb is "taught". To whom the "Taught" was being done? to "us"

Therefore, the indirect object is "us"