Question

look at this dictionary entry.

illusion \ih-loo-zhuhn\\ noun illusions 1. something that is not what it appears to be: when colton flipped through the series of images quickly, they created the illusion of motion. 2. a false notion or belief: there had been thousands of girls at the audition, so kimberly had no illusions about her chances of getting the part. — from latin (illusio)

which sentence uses the word illusion correctly?

zebras’ black and white stripes create optical illusions that confuse insects and predators on the savannah.

the novel finnegans wake is famous for its many illusions to other works, including the plays of shakespeare and the egyptian book of the dead.

Explanation:

The first definition of "illusion" is "something that is not what it appears to be." The correct sentence uses "optical illusions" (visual things not appearing as they are) which matches this definition. The second sentence incorrectly uses "illusions" instead of "allusions" (references to other works).

Answer:

Zebras' black and white stripes create optical illusions that confuse insects and predators on the savannah.