what is the meaning of distributive pronouns?

[Farmakor]

English Grammar Error, Intermediate level

ESL/EFL Test #12 "Some Advice", question 1

I wonder if you would be able to give me some aid after you've finished work tomorrow.

(a) wonder
(b) be able to
(c) aid
(d) finished

English Grammar Error, Intermediate level

ESL/EFL Test #12 "Some Advice", answer 1

I wonder if you would be able to give me some help after you've finished work tomorrow.

Correct entry: help
The error was: (c) aid
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what is the meaning of distributive pronouns?

Farmakor

[Mister Micawber]

.
A distributive pronoun considers members of a group separately, rather than collectively.

They include each, any, either, neither and others. (Wikipedia)
.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber