The two sentences that give examples of similes are:
- "You’ll be walking a tightrope if you decide to stop for lunch before the meeting."
- "When Andre picked up the calculus textbook, it felt like a 600-page slab of concrete."
(Note: The first sentence refers to a metaphor, which may not fit the strict definition of a simile, but similes can also reference actions or situations. If the strict definition of a simile is required, the last two sentences are relevant for discussion.)
In pure simile terms, "After the rain, the beach was as hot and humid as the inside of a pressure cooker" is also valid. Therefore, the sentences demonstrating simile should be:
- "After the rain, the beach was as hot and humid as the inside of a pressure cooker."
- "When Andre picked up the calculus textbook, it felt like a 600-page slab of concrete."
These include the comparison using "as" and "like," which are key indicators of similes.