What does "requirement" mean?

[Lesserman]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #293 "Economics Questions test (1)", question 2

When someone really likes a product but that item is not necessary to stay alive, the product is called a ......... or a luxury.

(a) want
(b) need
(c) requirement

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #293 "Economics Questions test (1)", answer 2

When someone really likes a product but that item is not necessary to stay alive, the product is called a want or a luxury.

Correct answer: (a) want
_________________________

What does "requirement" mean?

Lesserman

[Mister Micawber]

.
No, 'want'. The item is not required (= not necessary).
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber