rainforests of the Amazon. To date, an estimated 438,000 species of plants of economic and social interest have been registered in the region with many more remaining to be discovered or catalogued. Climate Some latitudes can create a region with hot and humid climates. The existence of heat and the enormous liquid mass favor evaporation and make the region a very humid area. Dominated by an equatorial climate, the region presents high temperatures throughout the year (averages from 24 °C to 26 °C), a low thermal amplitude, with the exception of some areas of the states of Amazonas, Rondônia and Acre, where the phenomenon of "friagem" occurs, due to La Niña's activity, allowing cold air masses coming from the South Atlantic Ocean to penetrate the states of the South Region of the country, pass through the Central-West region and reach the Amazonian states, causing rapidly falling temperature. The Amazonian heat provides an area of low latitude that attracts masses of polar air. Occurring in winter, the effect of "friagem" lasts a week or so. Political Subdivisions Culture With its own folklore, the main attractions are the Parintins Folklore Festival, Círio de Nazaré in Belém, Rio Branco and Macapá; Sairé Festival, in Santarém, ExpoAcre (the largest in the North region) and typical dances, Marujada, Carimbó, Brazilian Calypso, Tecno brega and Cirandas such as Samba lelê and others. In the region, there are some of the most beautiful theaters and palaces in Brazil: The Amazon Theatre, located in Manaus, Palácio Rio Branco, in Rio Branco, Palácio Senador Hélio Campos, in Boa Vista, Teatro das Bacabeiras, in Macapá and the Peace Theatre, located in Belém. The gastronomic culture of the northern region of Brazil is quite rich, has Indigenous, African and Portuguese roots, in addition to other influences from both within Brazil and other cultures outside the country, the strong Amazonian indigenous influence in its main dishes is remarkable, among the main highlights are delicacies such as duck in tucupi sauce, maniçoba, tacacá and a menu of a wide variety of species of Amazonian fish, such as pirarucu, tambaqui, jaú, piramutaba, among other species; a huge menu of fruits, such as the local açaí, pupunha, tucumã, cupuaçu, buriti, abiu, urucu, Malay apple, cumaru, guaraná, and ingá, among other fruits. The whole region has a rich variety of ingredients, but also foods based on cassava such as water flour, uarini flour, tapioca flour, tapioca