What is the main idea of this text? Please hurry

If you want to change from landscape orientation to portrait orientation, what would you do? turn the camera around. flip the camera over. turn the camera 90 degrees. turn the camera 360 degrees.

According to the mla format, which best demonstrates the similarities and differences between the citations of a magazine and a book? both require the title and author, while magazines require the editor of the magazine. both require a date of publication, while magazines require the page number of the article. both require the format of the book, while books require the page number of the information. both require a location of publication, while books require the edition of the book if there is more than one.

Something there is that doesn't love a wall, that sends the frozen-ground-swell under it, and spills the upper boulders in the sun; and makes gaps even two can pass abreast. the work of hunters is another thing: i have come after them and made repair where they have left not one stone on a stone, but they would have the rabbit out of hiding, to the yelping dogs. the gaps i mean, no one has seen them made or heard them made, but at spring mending-time we find them there. whom does the speaker blame for the gaps in the wall? himself his neighbor nature and hunters rabbits and dogs