Question

what is used to accurately position objects on the slide using a single horizontal and vertical line that represents its center of the slide?
o guides
o gridlines
o ruler
o border

Explanation:

Guides are used to accurately position objects on a slide. A single horizontal and vertical line representing the center of the slide is a common guide feature in presentation software. Gridlines are a network of lines, a ruler is for measuring lengths, and a border is around the edge of the slide.

Answer:

guides