Question about'' BBC | British Council Test

[symaa]

Hello,

I want to ask you about the following question:

Choose the best answer for each sentence:

1. Lord of the Rings is a long film but the special __________ are
fantastic.
a. affects
b. effects
c. scenes
d. tricks

The right answer is ''effects'', but it does not make any sense to me, I think
that scenes or tricks are more appropriate.

Would you please tell me why ''effects'', here, is the right answer?

Thank you.

[Tdol]

The use of stunts, lighting, photography, computer graphics, etc, is called special effects.

[symaa]

The use of stunts, lighting, photography, computer graphics, etc, is called special effects.

Thank you so much teacher for the clarification.
Best wishes,