Why did some of the finches disappear from the environment on the screen? Usetheir food source (hard-shelled nuts) and beak shape to explain your answer.

Explanation:

For the finches, body size and the size and shape of their beaks are traits that vary in adapting to environmental niches or changes in those niches. ... Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds.They started out with beaks good for seeds then went off into leaves, insects, fruit, and grubs. All finches adapted to their island and brought up the reproduction rate since they weren't all fighting for the same food. ... The finches beaks adapted to the food source which was favored by natural selection

i think that the answer is polishing peanuts

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."