What is the main function of arithmetic and logic unit?

Which sentence is the best explanation of how food surpluses led to a job specialization during the neolithic revolution

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period? if there should be a waiting period, explain why.

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u.s. citizens need to protect in order to preserve the democratic political system and the american way of life.