All Non-Text content must have text alternative

[alohr51]

All Non-Text content such as images, charts, graphs, media files, CAPTCHAs, audio alerts, etc. that convey information to the user, must have appropriate text alternatives.

Verify non-text content is labeled or has a text alternative by

1. inspecting the code for proper labeling techniques
   1. alt attribute on images to describe them. Leave blank if the image is only for decorative purposes.
2. aria-labels on actionable items https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Techniques/Using_the_aria-label_attribute#Examples