The meteorological service economy includes two levels of meaning. One is to use meteorological services to prevent disasters and to prevent risks and losses; the other is to use powerful meteorological conditions to create benefits. People can use meteorological information as a basis for decision-making in economic activities First, according to the information provided by meteorological services, production and operation activities can be arranged to reduce economic losses and improve economic benefits. According to the above definitions, Which of the following are meteorological services economy:. ['Fishermen cancel sea operations based on typhoon alert.', 'College students choose travel time based on the weather forecast.', 'Telecom service provider releases SMS for paid weather forecast.', "Choose the best launch timing of the satellite according to the Earth's revolution cycle."]