Speculation is the purchase of goods for later (or temporary sale) in order to profit from changes in their prices. According to the above definition, which of the following is speculation? ['Ten years ago, Lao Zhang contracted 15 acres of orchards in the village that no one wanted, and now he relies on fruit trees to get rich.', "Xiao Liu recently bought a pair of leather shoes and resold to friends because she didn't like the style.", 'Lao Yang buys 2000 shares at a price of 10.03 yuan and sells it at 11.00 yuan.', 'Mr. Wang bought a house for his own living. After the house price rose, Mr. Wang sold the house to make a profit.']