You might want to illustrate an article on recumbent trikes with a picture of a recumbent trike. (Google images would find plenty of them.)
Recumbent trikes are more expensive than upright "adult trikes" but there is a world of difference. Even the low-end recumbent trikes are more comfortable and have more gears, for easy hill-climbing. High-end recumbent trikes can be amazing racing machines, or long-distance touring vehicles; some have crossed the US in just a month.