The following is Quora's policy on adding images and videos to answers and reviews:
(Per: What is Quora's policy about nudity and sexual images?)
Adult images or videos (including graphic violence and sex-related media) are only allowed on pages involving adult topics and which have been tagged with the appropriate Quora Adult topic(s) (i.e., Specific Types of Adult Content, Sex and/or other topics). This will limit the distribution to users who have actively opted in to seeing such content.
Because user profile pictures, space icons, and topic images appear throughout the site, sex-related image content is not permitted in these types of images.
Images of Graphic Violence
Images and videos of extreme graphic violence (or links to such images/videos) are only allowed in answers if (1) they are clearly helpful and necessary to the answer, and (2) they clearly do not glorify violence. Questions that specifically ask for pictures of graphic violence must have the Adult Content on Quora topic tag applied.