Как меняется клетка растения с возрастом?

Tourism is travel for recreational, leisure or bussines purposes. tourism has become a popular global leisure activity. it is important and in some cases vital for many countries.there are a lot of different kinds of tourism and every of this kinds have different travel agency. so there are a lot of Tour Operators. The most common example of a tour operator's product would be a flight on a charter airline plus a transfer from the airport to a hotel and the services of a local representative, all for one price. for example: «UTE Megapolus Group», «Fortuna»,«ВКО Travel»,«Global-Travel», «Stella-polaris», etc. now many people are in the habit of travelling around different countries therefore tourist business is a very profitable business.also they are very useful. they can help people to choose the best variant which place to visit. A travel agency's main function is to act as an agent, selling travel products and services on behalf of a supplier. Consequently, unlike other retail businesses, they do not keep a stock in hand. A package holiday or a ticket is not purchased from a supplier unless a customer requests that purchase. to conclude,i can say, that tourism nowadays is one of most important aspects of the development of the country.