Which sentence states a central idea in "Cool Jobs Part 1"? Cool Jobs Part 1

1. They swabbed every place the burglars had touched, looking for bacteria and other microbes the women might have left behind.

2. If you touch a surface, you leave behind millions of bacteria and other microbes.

3. One issue is that the science of analyzing microbial DNA is still imprecise.

4. Each sample tends to hold hundreds of thousands—or even millions—of single-celled organisms.

If you touch a surface, you leave behind millions of bacteria and other microbes.

Explanation:

I think it is If you touch a surface, you leave behind millions of bacteria and other microbes.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking. 

devin will have to drain the rain out from his garage.