Which statement can be inferred from the passage?

Long before modern machinery, farmers in the Andes learned to farm slopes that look far too steep for crops. They cut the hillside into a staircase of flat platforms held up by stone walls, and filled each platform with fertile soil. These terraces slow the run-off of rain, so the water soaks in instead of washing the soil downhill. The stone walls also store the heat of the day and release it at night, which protects plants from the cold of high altitude. Because each level sits at a slightly different height, farmers can grow different crops within a single hillside. Many terraces still produce food today, which shows how well the design suits the mountains.

Answer and explanation

Correct answer: A. Growing several crops on one hillside is possible

  1. Step 1: The passage says each level sits at a slightly different height and that farmers can grow different crops in one hillside.
  2. Step 2: So the difference in height is the reason for the variety of crops.
Answer
Growing several crops on one hillside is possible.
Why not the others: The text says many terraces still produce food and that terraces keep the soil from washing away; it says nothing about visitors.

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