How do you organize a written blog? What are the main parts of a blog? How can you organize a blog?

What is the main idea of this paragraph from the volcanoes section of the ready.gov website

During an experiment measuring the change in temperature of a chemical reaction your digital thermometer breaks. you have the same model thermometer available to use how do you proceed with the experiment a. continue on with the new thermometer b. begin the experiment again with the new thermometer c. calibrate the new thermometer and make a notation regarding the change in equipment d. calibrate the new thermometer and begin the experiment again

Write a fiction story which gives a moral lesson