Read the following passage and answer the questions given below it:
The sugar maple is a hard maple tree. It can grow as tall as 100 feet and as wide as 4 feet. The sugar maple is commercially valued for its sap, which is used in the making of maple syrup. Two northeastern states, Vermont and New York, rank as major producers of maple syrup. In Canada, Quebec's annual syrup production surpasses 2.5 million gallons. To make pure maple syrup, holes are made in the trunk of the tree at the end of the winter or in early spring. The water-like sap seeps through the holes and runs through a plastic spout that is put into the hole. Afterwards, the collected sap is transferred into tubes that are hooked up to a tank kept in the sugar house. Then the sap goes through the boiling process. Boiling enhances the flavour as well as adding colour to the sap. Once the sugar content of the sap is about 65-66%, the sap is ready to be strained and marketed. The maple syrup found in the supermarkets, however, is usually not pure and has other additives. The colour of pure maple may range from golden honey to light brown. Between 35 to 50 gallons of sap are needed to produce 1 gallon of maple syrup. Also popular for strength and finish of its wood, the sugar maple tree has been put to use in furniture, interior woodwork, flooring, and crates.