What is a main idea? How does one create a main idea?

How did moon shadow's point of view of this father change from the first scene to the second scene?

The main characters in realistic fiction are usually dynamic; they undergo change and grow according to their experiences. louise mallard from kate chopin’s “the story of an hour” is an example of a dynamic character. which of the following excerpts from chopin’s story highlight the transformation that louise undergoes?

Which sentence is punctuated correctly?  a. under a microscope; the organisms look a bit like ruffled tennis balls they have armored plates that fit together to make a round shape. b. when the water is disturbed; the organisms respond by glowing this makes swimmers look like floating beams of blue light. c. there is a bay in puerto rico that seems to light up at night; the light comes from tiny organisms in the water. d. the luminescence attracts visitors from around the world people are curious to see; this beautiful otherworldly sight.