If you want a picture to be positioned behind another object, which option would you select?

Selecting the option to "Send Backward in the Format Ribbon Tab" is the appropriate choice when positioning a picture behind another object. This function allows you to adjust the stacking order of objects on a slide, effectively moving the selected image behind others.

When you choose to send an object backward, it layers the selected object further back in the stack of items on the slide, ensuring that it does not obscure the frontmost objects. This is particularly important in presentations where visual hierarchy is key, allowing you to maintain clarity and visibility of the main content while still incorporating background imagery effectively.

The other options, while useful in different contexts, do not serve the same purpose of moving an object behind another specifically. "Bring Forward" would bring an object in front of others rather than behind. Using the "Arrange" menu in the Home Ribbon serves similar functions, but it may not explicitly direct the movement backward with the same clarity and ease as the dedicated action in the Format Tab. Layering objects in Slide Master view is more about designing templates rather than organizing the immediate layer order on a single slide.