Please answer the following question by reasoning step-by-step.
John knew that the snake probably wasn't real because he lived in the Midwest, and anacondas live in what regions?\nOptions:\n- nightmare\n- wyoming\n- tropics\n- ditch\n- pet shops

tropics
Anacondas lives only in tropics region.

John knew that the snake probably wasn't real because anacondas live in tropics region and he lived in the Midwest.

.

Therefore, the answer is tropics