Identify the source of linen from following:

- (1) Flax plant: Linen is a natural fiber derived from the flax plant (Linum usitatissimum). The fibers are obtained from the stem of the flax plant and are known for their strength, durability, and breathability. Linen is one of the oldest textile fibers used by humans.
- (2) Cotton plant: Cotton fibers come from the cotton plant (Gossypium), not from flax. Cotton is widely used to make fabrics like cotton cloth, but it is a different material from linen.
- (3) Cane plant: The cane plant, such as sugarcane or bamboo, is not a source of linen. However, bamboo fibers are used to create textiles in some cases, but this is not the source of linen.
- (4) Rubber plant: Rubber comes from the latex of the rubber tree (Hevea brasiliensis) and is used for making rubber products, not linen fabric.