Find a good quality photo for each bullet on your list slides.
For Births/Deaths slide, you may want to adjust the width of your text box so you can make you pictures bigger, filling up more of the slide. Just make sure you resize the text box, but do NOT move the text box up or to the left!
You may want to re-order your bullets so the bullet with the shortest text goes last (giving you more room for your pictures at the bottom).
If you have any text being covered by a photo, you can:
Make sure the bottom right of your slide is filled with a picture; then fill up beside and above that. If you're going to have an empty area, make it at the top of the slide or under the list.
Get your pictures checked.