The restaurant is trying to attract more customers, and the new menu is an important 'piece of the puzzle'. [=an important part of what is being done]
Ecologists no longer view different species as independent, but instead see them as pieces of the same 'jigsaw puzzle'.
His strange behavior is a 'puzzle' to his friends. [=his friends don't understand the reason for his strange behavior]
(..) statistical analysis. The servers are working. So then we don't need any more funding? No, sir. Using Heidi's Emoji analysis, we have the final piece of the puzzle. So far, we have narrowed down the location of the troll attack on Denmark. It is a location in the middle of the United States, (..)2016 TvShow: South Park Title: Fort Collins Season: 20 Episode 6