Answer:
This sentence is an example of figurative language because it contains the word "like" or "as."
Explanation:
Figurative language is the literary technique used by writers to convey meaning or give color to their works by using different forms of literary techniques. These techniques may include similes, metaphors, alliteration, personification, etc among others.
The given sentence "Suddenly, a thought struck Isaac like lightning" is a figurative language as it contains the words "like" or "as". These words are used when the writer uses a simile to provide a comparison between two unlike or unrelated things. It means that Isaac is not literally hit by lightning, but he came up with an idea.