400
Which of these steps of maple syrup production doesn't belong?
- Sap is emptied into a large barrel and taken to a sugar house.
- A hole is drilled into a tree, and a spout is placed in the hole.
- Sap is boiled until water evaporates and pure maple syrup remains.
- Sap is ready to flow only when temperatures drop below freezing.
Sap is ready to flow only when temperatures drop below freezing.