The Taj Mahal is an example of Mughal architecture
The Proclamation applied in the ten states that were still in rebellion in 1863, and thus did not cover the nearly 500,000 slaves in the slave-holding border states (Missouri, Kentucky, Maryland or Delaware) that had not seceded. Those slaves were freed by later separate state and federal actions.
The main purpose of public opinion polls is to gain data/information on how citizens feel about a particular topic, event, or political candidate. For example, one of the most popular political polls we see usually asks citizens to assess the president's recent actions. This type of question allows for a general understanding of what people like/dislike about the president.
Public opinion polls, however, can be used for almost any topic. From their, people will analyze the information in order to understand what things can be improved on or what exactly the citizens want.
