Besides burying the bottom edge six inches deep, what physical feature must a snake-proof fence possess?

Answer

It should lean outward, away from the property, at about a 30-degree angle.

The fence requires an outward lean of approximately 30 degrees, which makes it difficult for a snake to climb or push its way underneath the buried portion.

Besides burying the bottom edge six inches deep, what physical feature must a snake-proof fence possess?
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