Roland wants to ensure his study of how people interact with one another meets scientific standards. what must he include in his study

If he wants the study to meet scientific standards then the study needs to adhere to the scientific method. The scientific method is made up of several steps.

Step 1: Define the question he wants to ask. So in this it would be something along the lines of, how do people interact with one another.

Step 2: Then do background research into the subject matter.

Step 3: Construct/devise a hypothesis. What does he expect the outcome of the study to be.

Step 4: Test his hypothesis by carrying out the experiment. Make it clear what kind of experiment he intends on using for example an observation.

Step 5: Analyze the data gathered from the experiment.

Step 6. Draw a conclusion from the results.

Step 7: Share the results through writing a report/article.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place