Which option in presentation software can you use to apply a “fly in” effect to the objects on a slide?

The answer is Animation.  

Explanation:

In PowerPoint, If you want to make a piece of text or an object have a “Fly in” entrance effect, then the Animation option or Tab is where you would be required to click. Once this option is selected, a list of animation style will pop up. Continue to click on the “Fly in” animation style. This effect makes the objects fly in from the bottom, top, right, or left.

answer; i believe the correct answer is (a) all trenches must have access/egress;

that would be my answer.