How do you bold questions and add spaces between paragraphs on using a computer?

the same

Explanation:

you bold, and add space bar is still the same

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

a term is used to describe a sudden revelation in a short story is "showing forth".