The four features of a good paragraph are : topic sentence, evidence, examples and 

conclusion sentence 

Question 2

Museums play an important role in transmission of civilizations and in transmissions of history to the next generations. Museums are one of the most important places that the visitors should visit. However, museums transmit information and photographs about nation civilization. Everybody in the world should see the culture and history of their own country, so the admission fee must be free in order all the families in the country can visit it. Children, teenagers and adult people must show the culture and civilization of their own country. In addition to poor and rich people also must show these cultural and historical museums because the history is not related to wealth. For example, Iraqi National museum is one of the most famous museums in Iraq. Iraqi national museum established in 1923. It consists of antiques and it has a library which included English and Arabic books, newspapers and magazines. These books show the culture and heritage of the country. Iraqi national museum also contain museum of child, so it is popular in Iraq. When the admission fee of museum free, this leads to encourage the people to visit the museum in addition to foreign tourists and  this reflected to the country in positive way, so this improve the economic situation. when the admission fee is free and available to all families, it does not become a forgotten culture. Lastly, Museums show the most important old culture and Customs and traditions, So museums should be free.