Question

what is the meaning of the word treacherous as used in the passage?
the poison garden in alnwick, england, may be the most treacherous garden in the world. the one hundred different plants in the garden all have one thing in common: they can kill you. because the garden is so dangerous, visitors arent allowed to touch, smell, or taste the plants.
serious
cautious
curious
hazardous

Explanation:

The passage states the garden's plants are dangerous enough to kill people, and visitors cannot touch/smell/taste them. "Treacherous" here describes the dangerous, harmful nature of the garden, which matches the definition of "hazardous". The other options do not fit: "serious" does not capture the dangerous quality, "cautious" describes a careful attitude, and "curious" means inquisitive.

Answer:

hazardous