Required items: #2 background image, #9 opacity, #12 image map. Plus 5 extras: #1, #3, #4, #7, #8.
#1 Figure box

#2 Background image (required)
This section uses background-image
with background-size: cover
.
#3 Border
This card shows a 3px solid border.
#4 Rounded borders & #7 Box shadow
All cards use border-radius
and a soft box-shadow
.
#8 Linear & radial gradients
Linear gradient
Radial gradient
#9 Opacity (required)

Hover: image fades to 50% opacity
#12 Image map (required)
Click the regions. Image is 800×400 so coords are accurate.

Left rectangle → Neocities, middle circle → MDN, right rectangle → reference.