I'll give you a question, please answer with step-by-step reasoning process.
The sloth heard portuguese being spoken nearby and cowered, where was the sloth?\nOptions:\n- tropical forests\n- dictionary\n- amazon basin\n- congo\n- tropical rain forest

amazon basin
The portuguese are found at an amazon basin.

The sloth was at amazon basin where he heard portuguese being spoken nearby and cowered.

.

So, the answer is amazon basin