If you touch a surface, you leave behind millions of bacteria and other microbes. If each person’s community of microbes is unique, this bacterial smudge could act like a fingerprint. Why does the author use the description “bacterial smudge”?
From: Cool Jobs Part 1
1.) to illustrate the most difficult part of analyzing a bacteria sample from a person
2.) to show that a collection of microbes is the surest way to catch people
3.) to describe the best way to collect more than one microbial sample from a person
4.) to emphasize that all people leave behind an identifiable trace of themselves

Read the excerpt from frederick douglass’s speech “what to the slave is the fourth of july? ” go where you may, search where you will, roam through all the monarchies and despotisms of the old world, travel through south america, search out every abuse, and when you have found the last, lay your facts by the side of the everyday practices of this nation, and you will say with me, that, for revolting barbarity and shameless hypocrisy, america reigns without a rival. which phrase best describes the connotation of the word “reigns”? a sense of opportunity and growth a sense of fear and anxiety a sense of compassion and humanity a sense of oppression and domination

3. cite evidence the author cites several statistics in the section "why protest? "what are some of these statistics, and what is their function in the document?

What is the italicized part in the sentence , all of the operators are efficient.