"I walked a million miles to get here" is an example of –

Correct option is A

Explanation:
The correct answer is Hyperbole.

Hyperbole is a figure of speech that involves exaggeration for emphasis or dramatic effect. In the sentence "I walked a million miles to get here," the speaker does not literally mean they walked a million miles, but rather they are emphasizing that they walked a very long distance.

Information Booster:
An intentional exaggeration not meant to be taken literally. 
Hyperbole is commonly used in literature, poetry, and everyday speech to create humor, emphasis, or dramatic effect.

Common Examples of Hyperbole:
I have a ton of homework!
I told you a thousand times!
She cried a river of tears.

Purpose of Hyperbole:
To create emphasis.
To add humor or drama.
To make speech or writing more expressive.

Hyperbole in Literature:
"I had to wait an eternity."
"Her smile was as bright as the sun."

Additional Knowledge:
Satire  – Satire is humor or irony used to criticize something.
Onomatopoeia  – Onomatopoeia uses words that mimic sounds (e.g., buzz, bang, splash).
Simile  – Simile compares two things using like or as (e.g., She was as fast as a cheetah).