Rewrite the following sentences in the passive. the agent where necessary.

Physical activity plays an important role in the development of overall health and prevents various diseases. Apart from preventing diseases, playing sports is an excellent physical activity and thus aids in improving the functional capabilities of body. Sports are not only beneficial to young people, but also for older generations. However, it is always good to start early. Kids should be encouraged in participating in playing sports at school or at social events. This helps in obtaining the maximum amount of positive results of playing sports involving physical activity. Many older people find improved alertness over time if they engage in sports.

The most beautiful and wonderful city it is Brisbane. 
It is the third largest cool city after Sydney and Melbourne
Today the town is a curious mixture of modern megapolis with a colonial city.The architecture combines the spires of Victorian churches with palm trees,  before facades skyscrapers
Around the city there was an extensive parks, where you can safely take a walk or read a book.
 In the vicinity of you can find a lot of zoos and reserves, which, particularly, will be interesting to children. Here you are allowed to feed the different kinds of kangaroos, from the very small to the very large, which is always very friendly and always happy to hear.
Brisbane is a beautiful tropical city, but it is usually overlook. Here rarely stopped for more than one or two nights, as all at once sought to resort gold Coast located a 2-hour drive on the highway to the South. Usually in Brisbane stop for two reasons - a business trip or transit. 
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